Question # 1

The ratio of size of the image to the size of the object is called

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Resolving power

Magnification

Power

None of these

Which one the following gives three regions of electromagnetic sepctrum in order of increasing wavelength?

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Gamma rays, micro waves, visible light

Radio waves, ultraviolet waves, X-rays

Ultraviolet rays, Infrared rays, micro waves

Visible light, gamma rays, radio waves

In Young's double slit experiment, the fringe width depends on

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wavelength of the light used

distance between the slits and screen

distance between the slits

all of them

No of spark plugs needed in diesel engine is:

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Four

Five

Six

None of these

Wave front is the locus or all points in vibration are in the same

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Frequency

Phase

Wavelength

All of these

If S is the stress and Y is Young's modulus of the material of a wire, the energy stored in the wire per unit volume is

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2 S²Y

S²/2Y

2Y/S²

S/2Y

The equation of continuity of fluid is based on the

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Law of conservation of energy

Law of conservation of mass

Law of conservation of momentum

All of these

The speed of light in vacuum is 3 x 10⁸ ms^-1.Its speed in a medium of refractive index 1.5 will be

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6.5 x 10⁸

2 x 10⁸ ms^-1

4.5 x 10⁸ cm

5.5 x 10⁸

The typical speed of reconnaissance jet (SR-71) is

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900 ms^-1

950 ms^-1

980 ms^-1

990 ms^-1

The dimensions of Planck's constant is equal to that of

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Energy

Momentum

Angular momentum

Power

1^st superconductor was discovered in year

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1890

1930

1895

1911

Which of the following is equal to:

joule x ohm /volt x second?

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Ampere

Volt

Watt

Tesla

Crystalline solids are also

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Metals

Ionic compound

Ceramics

All of them

No body begins to move or comes to rest of itself said by

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Thomos Young

Abu Ali Sena

Newton

None of these

The conduction of electrons takes place and conduct electric current through solids is a

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Energy band

Conduction band

Valence band

Completely filled band

The sink in the heat engine is at

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Low temperature

High temperature

Zero temperature

None of these

How much water a pump of 2kW can raise in one minute to a height of 10 m.take g = 10 m/s²?

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1000 liters

1200 liters

100 liters

2000 litre

The value of g is maximum at

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The equator

The poles

The center of earth

Between poles and equator

A gas which strictly obeys the gas laws under all conditions of temperatures and pressure is called:

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Ideal gas

Inert gas

Real gas

None of these

Blood vessels are not

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Flexible

Rigid

Some times flexible

None of these

Which of the following are the units of intensity of light

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Pois

Lux

Siemen

candela

There are two electric bulbs of 40 W and 100 W. They are first connected in series and then in parallel across a source:

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40W bulb will be brighter in series and 100W in parallel

100W bulb will be brighter in series and 40W in parallel

40W bulb will be brighter in both the cares

100W bulb will be brighter in both the cares

A shortsighted person can see clearly

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Near objects

Far objects

Objects at 25 cm

Objects at infinity

The resultant of two equal forces is double of either of the forces. The angle between them is

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120°

90°

60°

180°

A sonometer wire 100 cm in length has a fundamental frequency of 330 Hz. Thevelocity of propagation of waves along the wire is

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115m/sec

660m/sec

990m/sec

The instantaneous velocity is define as the limiting value ofΔd/Δtwhen the time intervalΔt approaches to

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zero

maximum

minimum

infinity

When V₁is approximately zero then Bernoulli's equation reduces to

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Torricelli's theorem

Venturi relation

Equation of continuity

None of these

The speed of swimming of porpoise is

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5 ms^-1

6 ms^-1

8 ms^-1

9 ms^-1

The SI unit of momentum is

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Kgms^-1

Kgms^-2

NS

A and C

The average velocity of Jupiter in Kms^-1

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25

50

58.4

61.0

No entropy change is associated with:

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Isothermal

Adiabatic process

Isobaric process

None of them

The materials in which valence electrons are bound very tightly to their atoms and are not free, are known as

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conductors

insulators

semi-conductors

all of them

The speed of commercial jet (air liner) is

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200 ms^-1

267 ms^-1

327 ms^-1

335 ms^-1

The direction of angular acceleration is

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Opposite of the axis of rotation

Along the axis of rotation

Perpendicular to the axis of rotation

None of these

A convex lens of focal length 5 cm is used as magnifying glass Its magnifying power when the image is formed at infinity

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6

5

1.5

7

The shearing strain is measured by

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Angle of rotation

Shearing stress

Angle of shear

Modulus of rigidity

If 'd' 'm' and fringe spacing ΔY are known, the interference effect due to light of λ

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Cannot be determine

Can be determined in same cases

Can be determined

None of these

If the acceleration due to gravity is 10 ms^-2 and the units of length and time are changed to kilometer and hour respectively,the numerical value of acceleration is

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360000

72000

36000

129600

A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along the shortest path in 15 minutes.The velocity of the river in km/s is:

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1

3

4

√41

The product of force and time of impact force is called

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Momentum

Impulsive force

Impulse

Rate of change of momentum

In case of destructive interference of two waves, the amplitude of the resultant wave will be ______ either of the waves

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Greater then

Smaller then

Equal to

None of these

The artillery shells travels along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

A stethoscope detects the instant at which the external pressure is

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Greater than systolic pressure

Equal to systolic pressure

Lower than systolic pressure

None of these

The temperature scale approved in SI units is:

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Calslus scale

Kelvin scale

Fehrenhelt scale

None of these

Physical quantities having no dimensions are called

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Scalar

Numerics

Non physical Quantities

None of these

The product of resistance and conductance of a resistors is equal to:

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1

Conductivity

Resistivity

Zero

The relative permitivity ∈_r for germanium is

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16

17

18

22

For the normal setting of a telescope

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Only the object is at infinity

Only the final image is at infinity

Both the object and the final image is at infinity

Neither the object nor the final image has to be at infinity

A double convex lens act as a diverging lens when the object is

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Inside the focus

Between f and 2f

At the focus

At a large distance

Age of the Earth is

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14 × 10¹⁷ sec

1.4 × 10¹⁹ sec

1.4 × 10¹⁷ sec

1.4 × 10¹⁵ sec

The typical speed of has working aunt is

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0.1 ms^-1

0.01 ms^-1

0.001 ms^-1

0.025 ms^-1

Which of the following is not measured in units of energy

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Couple (angle turned through)

Moment of inertia (angular velocity)²

Force (distance)

Force (time)

The unit Compton wavelength is same as:

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Compton wavelength

Compton frequency

Compton shift

Both (a) & (b)

Two charges are placed a certain distance apart in air. When a metallic sheet is placed between them the electric static force between them will

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Decrease

Increase

Remains unchanged

Become zero

In order to get interference using two light rays:

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The sources should be monochromatic and coherent

The sources should have the same frequency

Superposition should be linear

All of these

In n-type substances the minority carriers are

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Holes

Electrons

Neutrons

None

For a body moving with constant speed in a horizontal circle,which of the following remains constant?

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Velocity

Centripetal force

Acceleration

Kinetic energy

A bullet train move with the velocity of

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400 Kmh^-1

460 Kmh^-1

500 Kmh^-1

510 Kmh^-1

A copper ball of radius r is moving with a uniform velocity v in the oil. The dragging force acting on the ball is F. The dragging force on the copper ball of radius 2r moving with uniform velocity 2v in the oil is

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F

2F

4F

8F

Identify the pair whose dimensions are equal

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Torque and work

Stress and energy

Force and stress

Force and work

Spectrometer can measure quite accurately prism

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Deviation of light by a glass prism

Angle of prism

Refractive index of the material of prism

None of these

In petrol engine, the first stroke is the

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Power stroke

In take stroke

Exhaust stroke

None of these

The dimension of gravitational constant G are

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[ML²T^-2]

[M^-1L³T^-2]

[M^-1L²T^-1]

[M^-1L^-2T^-2]

Torque is a turning effect of a

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Body

Momentum

Force

None of these

A ______ lens is used in the apparatus to get Newton,s rings

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Plano-concave

Plano-convex

Convexo-concave

Double convex

The digital modulation is expressed in

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Bytes

Codes

Bits

None of these

A gravity free system, in which satellite moves due to

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The free fall acceleration

Radial accelerations

Gravitational acceleration

All of these

At the top of the trajectory of a projectile the directions of its velocity and acceleration are

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Perpendicular to each other

Parallel to each other

Inclined to each other at an angle of 45°

Antiparallel to each other

In photoelectric effect, if we increase the frequency of the incident light then of the electrons increased

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Number

K.E

P.E

Frequency

Under the elastic region, the deformation produced in the material is

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permanent

temporary

either of them

none of them

Viscosity of acetone at 30^oC in NSm^-2

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0.198 × 10^-3

0.224 × 10^-3

0.295 × 10^-3

0.301 × 10^-3

When an electric field is strong the lines are

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Farther

Closer

Parallel

All of them

A projectile on its path gets divided into two pieces at its highest point.Which is true?

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Momentum increases

Momentum decreases

Kinetic energy increases

Kinetic energy decreases

The discuss used by athletes has a mass of 1 kg, its weight in newtons is

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9.8 N

80 N

98 N

100 N

Above the curie temperature, iron becomes

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ferromagnetic

paramagnetic

diamagnetic

any one of them

In a Millikan's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19 C.The number of excess electrons on the drop is

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3.9

4

4.2

6

In a uniform circular motion of a particle, the direction changes but not its

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Angular displacement

Magnitude of velocity

Force towards centre

b and c

Spherical aberration can be reduced by using

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Convex lens

All the portions of the lens

Central portion of the lens

Upper portion of the lens

Fight of rocket in the space is an example of

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Newton's first law

Newton's third law

Newton's second law

all of them

Rocket engines lift a rocket from the earth surface because hot gas with high velocity

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Push against the earth

Push against the air

React against the rocket and push it up

Heat up the air which lifts the rocket.

SI unit of angular moment is

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Kgms^-1

Kgm²s^-2

Kgm²s^-1

Kgm³s^-1

A fighter plane is chasing another plane,when it opens fire its speed

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Increases

Decreases

Remains constant

Its stops

The deformation measured in terms of some twisting angle due to action of stress is known as

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Stress

Linear stress

Compressive stress

Shear stress

When a meteorite enters into earth atmosphere its energy converts into

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Kinetic energy

Heat energy

Mechanical energy

None of these

Which of these statements is not correct?

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Moment of inertia is independent of shape and size of the body

Moment of inertia depends on choice of axes

Moment of inertia does not depend on mass of body

None of these

Which one of the following can act approximately as a source of monochromatic light:

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Neon lamp

Fluorescent tube

Sodium lamp

None of these

In the Newton's ring, as we proceed towards the periphery of the lens, the thickness of air film

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gradually decreases

gradually increases

suddenly becomes zero

all of them

In cause of YDS experiment, the distance between adjacent bright fringes is given by

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Δy =λL/d

ΔY = L/λd

ΔY =λ/L

None of these

The low blood pressure is

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70 - 80 torr

75 - 80 torr

78 - 809 torr

79 - 80 torr

The light source in the transmitter can be either

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Light emitting diode

Semiconductor laser

Light emitting in an invisible infra red

All of these

The energy equivalent to the mass of one Kilogram is

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3 x 10⁸j

931 Mev

9 x 10¹⁶m

25 Mev

Relativistic mechanics was developed by

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Davison and Germer

Heisenberg

Max Planck

Albert Einstein

A ball whose kinetic energy E, is thrown at an angle of 45° with horizontal,its kinetic energy at highest point of flight is

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E

E / √2

E/2

Zero

A pulse of light in the optical fibres represents the number

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0

1

2

3

When two semiconductors of p- and n-type are brought into contact, they from a p-n junction which act like a:

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Conductor

Amplifier

Oscillator

Rectifier

The typical speed of 100 meters dash

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2 ms^-1

4 ms^-1

10 ms^-1

12 ms^-1

The SI unit of stress is same as that of.

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Momentum

Pressure

Force

Length

The body is in equilibrium when it is in a state of

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Accelerated motion

Uniform motion

Rest or uniform motion

None of these

The original source of hydroelectric is

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Water

Wind

Sun

Moon

What is the Young modulus of a meta?

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Extension/force

Force/extension

Strain/stress

Stress/strain

When the temperature difference between the source and the the sink increases, the efficiency of the heat engine will

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Increase

Decrease

Is not affected

May increase or decrease depending upon the nature of the working substance

The unit of Planck's constant h is same as that of

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Energy

Work

Linear momentum

Angular momentum

The polarized can be achieved by using process like

Choose an answer

Coherent sources

Diffraction

Selective absorption

None of these

The approximate efficiency of liquid fuel rocket is

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49%

50%

48%

47%

Energy can be added to a system even though heat transfer is

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Maximum

Minimum

Zero

None of these

In the following velocity time graph,the distance traveled by the body in meters is

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200

250

300

400

The example of nuclear fusion is:

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Formation of barium and krypton from uranium

Formation of plutonium -235 from uranium -235

Formation of helium from hydrogen

Formation of water from hydrogen and oxygen

To get p-type semiconductor we add impurity from

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3^rd group

4^th group

5^th group

6^th group

The low blood pressure is

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70 - 80 torr

75 - 80 torr

78 - 809 torr

79 - 80 torr

In an interference fringes pattern the fringes are

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Equally spaced

Wider near the centre and narrower away from it

Narrower near the centre and wider away from it

None of these

If rope of lift breaks suddenly,The tension exerted by the surface of lift is (a = Acceleration of lift)

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mg

m (g + a)

m (g - a)

0

The information carrying capacity in an optical fibre is called

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wavelength

frequency

bandwidth

none of them

Electron volt is a unit of

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Potential difference

Energy

Charge

Power

Which of the following is an example of Brittle substances?

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Copper and Brass

Brass and glass

Copper and glass

Only glass

Light year is measured in

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Time

Length

Speed

None of these

Fluid friction of a spherical body depend on the

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Shape

Size

Orientation

All of these

In deriving Bernoulli s equation we assume that the fluid is

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Incompressible

Non-viscous

In steady flow

All of these

The capacity of a condenser when a dielectric is placed in between its plates

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Increases

Decreases

Doest not change

There are earth stations which transmit signals to satellites and receive signals via satellite from other countries are

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200

Over 200

400

500

The rotational analogue of power is given by

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τω

τv

F ω

τ/ω

Which of the following cannot have an effect on the weight of an object?

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The distance of the object from a planet

The acceleration of the object

The placement of the object on a different planet

The mass of the object

If a ball comes back to its starting point after bouncing off the wall several times, then its

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total displacement is zero

average displacement is zero

none of them

both of them

According o Einsteins theory space time is

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Just coordinates

A straight line

Curved

None of these

The dielectric constant K of an insulator can be

Choose an answer

-1

Zero

0.5

5

A line normal to the wave front is called

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A beam of light

A ray of light

Both

None of these

Fiber optics also used to transmit light

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Around corners

Into inaccessible place

Formerly unobservable objects

All of these

A simple telescope is consists of

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One convex lens

Two convex lenses

Three convex lenses

None of these

Approximate power of Jumbo. Let Aircraft in watts.

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1.2 × 10⁶

1.3 × 10⁸

1.2 × 10⁸

1.1 × 10⁹

State the physical quantity represented by [ML²T^-2K^-1] where K is represents the unit temperature

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Thermal capacity of the body

Thermal conductivity

Specific thermal capacity

Entropy

When a light signal travels along the length of the optical fibre, the power lost by it is due to

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Reflection

Refraction

Seattering and absorption

Diffraction

Which does not show polarization?

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Longitudinal waves in gas

Transverse wave in gas

Both A and B

None of these

The units of the temperature coefficient of resistant are

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ΩK^-1

K^-1

ΩK

(ΩK)^-1

Acceleration produced in a body by a force varies

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inversely as the applied force

directly as the mass of the object

directly as the mass of the body

none of them

A material most suitable to make the permanent magnet are

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High retentivity

Large coercive current

Small domain friction

a and b

The unit of permittivity of free space ε_° is:

Choose an answer

Newton-metre²/coulomb

Coulomb/Newtonxmetre

Coulomb²/(Newtonxmetre)²

For obtaining appreciable extension,the wire should be:

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Short and thin

Long and thin

Short and tick

Long and thick

A compound microscopes consists of objective of

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Very short focal length

Large focal length

Very large focal length

None of these

The dielectric constant K of an insulator cannot be.

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3

8

6

∞

Young's modulus for brass is

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40

60

90

91

The acceleration of the rocket is

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If L and R represent inductance and resistance respectively,then dimensional formula of L/R will be

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ML°T°

M°L°T

M°L°T^-2

M°LT^-2

A body is moving with a uniform speed along a straight line.Its angular momentum with respect to a fixed point away from the line

Choose an answer

Increases as the body moves away from the point

Decreases as the body moves away from the point

Is zero

Is constant and does not depend on the position of the body

The critical temperature T for is

Choose an answer

1.6 K

2.71 K

3.72 K

2.82 K

The unit of torr or mm of Hg is opted instead of SI unit of pressure because

Choose an answer

Measurement is easy

Swift calculations

Extensive use in medical equipments

None of these

The young s modulus for a perfect rigid body is

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Zero

1

Infinite

None of these

The structure of the polymeric solid is:

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An ordered structure

A disordered structure

Intermediate between order or disorder

Any of these

None of these

Work done by a body when it covers some distance in suitable direction, may be

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Positive

Negative

Zero

All of these

If the error in the measurement of radius of a sphere is 1% then the error in the measurement of volume will be

Choose an answer

1.1%

3%

5%

8%

The cars usually have cylinders on the crankshaft are

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2

3

4

6

Who discovered the inverse square law of gravity

Choose an answer

Einstein

Newton

Compton

Fermi

A body is in its state of stress when it is

Choose an answer

Displaced from its equilibrium position

Remains at rest when shape changed

Their angles change

All of them

Which of the given pair have same dimension

Choose an answer

Stress, pressure

Elastic modules, pressure

Stress, elastic modules

All have same dimension

The wave nature of light was proposed by:

Choose an answer

Newton

Thomas Young

Huygen

None of these

In 420 days, the activity of a sample of polonium (Po) fell to one-eight of its initial value. The half-life of polonium is :

Choose an answer

140days

45days

87days

90days

The spacing between the parallel lines are served as

Choose an answer

slits

source of light

opaque lines

fringes

The half-life of a certain element is 3.5 days at STP. If the temperature is doubled and pressure is reduced to half then half-life of the same element will be:

Choose an answer

1.75 days

3.5 days

7 days

14 days

Mathematically the vertical velocity component is

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In semiconductors, the valence band at room temperature is

Choose an answer

Completely filled

Partially filled

Empty

None of these

In Young s double slit experiment the separation between the slits in halved and the distance between the slits and the screen is doubled the fringe with will

Choose an answer

Be doubled

Be quadrupled

Remain the same

Be halved

Which of the following statements about angular momentums is correct?

Choose an answer

Angular momentum remains conserved

Angular momentum is the product of moment of inertia and angular velocity

Moment of inertia is directly proportional to angular momentum for constant angular speed

All of these

Gain of operational amplifier is independent of;

Choose an answer

Internal structure

External Structure

Batteries

Potential changes

The kinetic energy of a body is four times its momentum its velocity is

Choose an answer

2ms^-1

4ms^-1

8ms^-1

16ms^-1

Acceleration of a body at any particular instant during its motion is known as

Choose an answer

average acceleration

uniform acceleration

instantaneous acceleration

all of them

In young's slit experiment on interference the ratio of the intensities of a bright band and a dark band is 6 : 1 the ratio of the amplitudes o the interfering waves is

Choose an answer

16

5/3

4

1/4

A circular scale is attached and graduated in

Choose an answer

One degree

2 degrees

Half degree

None of these

The momentum of a body is p and its kinetic energy is E its momentum become 2p its kinetic energy will be

Choose an answer

E/2

3E

2E

4E

Adjacent layers in laminar flow are

Choose an answer

Min with each other

Smoothly slide one over the other

oppose each other

None

Which of the following statements correctly describes the properties of two forces acting as a couple

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Equal, parallel and collinear

Unequal, anti-parallel and no-collinear

Unequal, anti-parallel and collinear

Equal, anti-parallel and non-collinear

The moment of linear momentum of a body is called

Choose an answer

Angular momentum

Couple

Impulse

Torque

Negative and positive charge in a hollow sphere are equal in the number then flux from the surface will be

Choose an answer

Zero

Positive

Negative

Flux will be both negative and positive

Total area of cross section is 0.25 m². If blood is flowing at rate of 100 cm³ /s then average velocity of flow of blood through capillaries is

Choose an answer

4mm/s

0.4mm^-1

400mms^-1

None

The magnitude of displacement is

Choose an answer

Distance between the two points

Distance in a curved path

Shortest distance between two points

None of these

If the body undergoes unequal displacements in equal intervals of time, the body moves with

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variable velocity

constant velocity

uniform velocity

zero velocity

In an astronomical telescope is the objective has the focal length f_o is

Choose an answer

Small

Very small

Long

None of these

For a measuring scale having least count of 10 kg, how many significant figure are there in 7000 kg

Choose an answer

1

2

3

4

The Bernoulli's equation is based on the

Choose an answer

Law of conservation of energy

Law of conservation of mass

Law of conservation of momentum

None of these

The law of conservation of linear momentum is valid for:

Choose an answer

Atoms only

Molecules only

Other systems only

All of them

In newton's rings see through the reflected light, centeral spo is:

Choose an answer

Bright

Dark

Either of the Two

None of these

The viscosity of water is

Choose an answer

0.019 x 10^-3 Nsm^-2

0.801 x 10^-3 N-sm^-2

6.29 x 10^-3 N-sm^-2

0.081 x 10³ N-sm^-2

Which of the following graph represents the velocity of a spherical body falling through a viscous medium

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In a semiconductor,the mobility of holes is

Choose an answer

Greater then electrons

Less than electrons

Equal to electrons

None

Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the smaller forces and the magnitude of resultant is 12.Then the magnitude of the forces are

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12 N,6 N

13 N,5 N

10 N,8 N

16 N,2 N

The S.I. unit of permitivity are

Choose an answer

Nmc^-2

C² N^-1 m^-2

Nm² C^-2

NmC^-1

Two forces of magnitude 7 N and 5 N act on a particle at an angle θ to each other.θ can have any value.The minimum magnitude of the resultant force is

Choose an answer

12 N

8 N

2 N

5 N

The power of a pump motor is 2 kilowatt.The water raised by the pump per minute to a height of 10 m is nearly

Choose an answer

500 kg

7000 kg

1200 kg

Zero

Vector subtractions is made when vectors are just

Choose an answer

Added

First make it negative then add

Only make it negative

None of these

The percentage uncertainties are when current I is following 0.84 ± 0.05 A due to potential difference 5.2 ± 0.1 V. The uncertainty of R is

Choose an answer

7.72 ± 0.5 ohm

6.62 ± 0.5 ohm

6.6 ± 0.5 ohm

None of these

Selenium is an

Choose an answer

Insulator

Conductor

Semiconductor

Photo conductor

Electrical activity of the retina the eye, generates which is used in electro ethnography as

Choose an answer

Current

Voltage

Resistance

None of these

The size of the molecules in comparison with the separation between the molecules is

Choose an answer

Small

Very small

Extremely small

None of these

A convex ens acts as diverging lens when the object is placed

Choose an answer

Between F and 2F

At 2F

Within the focal length

Beyond 2F

Which of the following is non-conservative field

Choose an answer

Gravitational field

Frictional field

Electrostatic field

None of these

If a glass slab is placed in the path of a converging beam of light The point of convergence of light

Choose an answer

Moves away from the glass slab

Moves towards the glass slab

Remains at the same point

Moves straight

A rocket carries its own fuel in the form of a

Choose an answer

Liquid and oxygen

Solid and oxygen

Both

None of these

Which color is not used in the combination of colors for color printing?

Choose an answer

cyan

magenta

green

yellow

The speed of secondary wavelets as mentioned in Huygen's principle is______the speed of propagation of the wave itself:

Choose an answer

Equal to

Greater than

Smaller than

None of these

The advantage/advantages of fiber optics than radio wave carriers

Choose an answer

Much wider band width

Capability

Immunity

All of these

Satellites are held in orbits by gravitational pull by Earth and are put into orbit by

Choose an answer

Initial velocity

Rockets

Escape velocity

None of these

In SI system the correct unit of Planck's constant is

Choose an answer

Kelvin

Js

Lux

Candela

Which pair of quantities are not derived quantities?

Choose an answer

Charge, Current

Current, Intensity of Light

solid angle, plane angle

None of these

The temperature at which the vibrations become so great that structure of the crystal breaks up, is called:

Choose an answer

Critical temperature

Temperature of vaporization

Melting point

Both A and C

Both A and B

What is the reason of ionic solids for not conducting electricity?

Choose an answer

free electrons are less

ions don't have translatory mention.

ions don't have translatory mention

the coordination number of the ion is very high.

Which of the following acid is unsaturated carboxylie acid

Choose an answer

Malonic acid

Oxalic acid

Succinic acid

Maleic acid

About 25% of earth crust mass is made up of element

Choose an answer

Oxygen

Silicon

Aluminium

Aluminates

Which factor is helping to reduce the environmental pollution:

Choose an answer

urbanization

industrialization

increases of plantation

rapid growth of population

Primary pollutant is that:

Choose an answer

Waste product of an industry

Which causes cancer

Whose concentration cannot be controlled

Which corrode the metal only

Which of the following metal cannot evolve hydrogen from the acetic acid

Choose an answer

Sodium

Potassium

Magnesium

Copper

Substances that tend to decrease the activity of enzymes are called:

Choose an answer

coenzymes

activators

inhibitors

apoenzyme

Glucose is a:

Choose an answer

ketohexose

aldohexose

meonosacharide

'b' and 'c'

Amino acids react together to form the primary structure of proteins which is accompanied by

Choose an answer

addition of water

addition of ammonia

removal of ammonia

removal of water

The smog having high contents of SO₂is

Choose an answer

Neutral smog

Reducing smog

Oxidizing smog

Artificial smog

The maximum oxidation state of Mn is

Choose an answer

+6

+7

+5

+4

Liquid hydrocarbon is

Choose an answer

methane

propane

ethane

hexane

Cyclone collector is used to reduce:

Choose an answer

noise pollution

air pollution

water pollution

radioactive pollution

Test of incomplete combustion of petrol in the presence of

Choose an answer

CO₂

SO₂

NO₂

Co

If allowed to expand, the gases suddenly

Choose an answer

heat up

move randomly

react

cool down

Which of the following substance is used as filler or additive in paper making:

Choose an answer

Glucose

Starch

Fructose

Cellulose

Mercury does not wet the glass because of

Choose an answer

repulsion

weak cohesive force

high viscosity

capillary action

Van der Waals equation explains the behaviour of

Choose an answer

Real gases

Mixture of gases

Ideal gas

Diatomic gases

Which of the following gases have lowest density at room temperature

Choose an answer

CO

N₂

Ne

NH₃

Aldehydes are easily oxidized to corresponding carboxylic acids in the presence of:

Choose an answer

Strong oxidizing agents

Highly strong oxidizing agents

Tollen's reagent

Tollen's reagent and Fehling solution

Third order of protein structure refers to

Choose an answer

Bending of protein chain

Three-dimensional structure of protein

Number and sequence of amino acids

Site of disulphide bonds

The starting substance for the preparation of iodoform is any of the following, except

Choose an answer

СН3СН(ОН)CН3

CH3CH2ОН

HCH2OH

CH3COCH3

The correct order of increasing attractive strength for weak intermolecular forces is....

Choose an answer

dipole-dipole interaction hydrogen bonding, van der Waals forces

van der waals forces dipole- dipole interaction, hydrogen bonding

hydrogen bonding, dipole-interaction, van der Waals forces

hydrogen bonding, van der Waals forces, dipole-dipole interaction

H-bonding is maximum in:

Choose an answer

ethanol

benzene

diethyl ether

water

Which of the following has the lowet solubility in water

Choose an answer

НСOOH

CH3СООН

CH3-CH2-СООН

C3H7-COOH

Which one of the following statements about glucose and sucrose is incorrect:

Choose an answer

both are soluble in water

both are naturally occurring

both are carbohydrates

both are disacharides

For which mechanisms, the first step involved is the same

Choose an answer

E1 and E2

E2 and SN2

E2 and E1

E1 and SN1

which of the following is not a symmetrical ketone

Choose an answer

4-heptanone

Butanone

Propanone

3-pentanone

In which system hydrogen bonding is not present

Choose an answer

solution of ethanol in water

linking of helix in protein molecule

structure of ice

solution of NaCl in benzene

Alicyclic compounds are the homocyclic compounds which contain a ring of

Choose an answer

5 or more carbon atoms

6 or more carbon atoms

3 or more carbon atoms

4 or more carbon atoms

Which of the following factors does not affect the SN1 rate is

Choose an answer

Nucleophilicity of the attacking nucleophile

Stability of the carbonium ion

Solvent system

The nature of leaving group

Benzene has pi electron

Choose an answer

2

4

6

8

The overall effect of the photochemical smog in the after noon is built up of

Choose an answer

Neutralization

oxidizing agent

Reducing agent

Activating agent

Which one of the following will behave least like an ideal gas at high temperature and low pressure?

Choose an answer

hydrogen fluoride

helium

oxygen

carbon dioxide

Choose the difference between natural and synthetic fertilizers:

Choose an answer

shapes

usage

crop application

raw material

Boiling point of water is higher (100°C) than that of ethanol (78.5°C) although both have hydrogen bonding. This is because

Choose an answer

water molecules are closely packed

water is more acidic than ethanol

ethanol is an organic liquid

number of hydrogen bonds are more in H₂O

The temperature in the incineration process has a range:

Choose an answer

900 to 1000°C

650 to 1100°C

950 to 1300°C

500 to 900°C

Oxidation of secondary alcohol produces

Choose an answer

Aldehyde

Ketone

Alkyl halide

Ester

Total heat content of a system is called

Choose an answer

Internal energy

Entropy

Enthalpy

All of these

The enzyme which is found in saliva, accelerates the conversion of starch into sugar is

Choose an answer

Pepsin

Thrombin

Ptyalin

Fumarase

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will

Choose an answer

remain unchanged

increase four times

reduce to 1/4

be doubled

Primary structure of proteins refers to

Choose an answer

Coiling and folding in form of specific structure

Number of amino acids in a chain

3d structure

Alpha and Beta sheets

Which of the following is not a charbohydrate

Choose an answer

Nuclic acid

Starch

Glycoyen

Cellulose

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Choose an answer

10,000

20,000

100,000

50,000

Which of the following alkyl halides shows higher reactivity?

Choose an answer

R __ F

R __ CI

R __ Br

R __ I

The forces which are present between the ions and the water molecules are known as

Choose an answer

dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

London dispersion forces

Glycine is characerized by

Choose an answer

Absence of an asymmeteric carbon

Absence of optical activity

The shortest amino acid

All of these

Crystals can be classified into

Choose an answer

7 crystal systems

4 crystal systems

3 crystal systems

14 crystal systems

Which of the following liquid has high vapour pressure?

Choose an answer

H₂O

ether

CH₃OH

C₂H₅OH

Which is the polymer that has amide linkage in its structure

Choose an answer

PVC

Poly ethene

Polyester

Nylon

Which among the following will show anisotropy?

Choose an answer

Wood

Glass

Paper

BeCl2

Which compound gives carbon when heated with conc. H2SO4.

Choose an answer

Starch

Ethyl alcohol

Oxalic acid

Formic acid

Which of the following alcohols is least reactive with respect to 0-H bond

Choose an answer

CH3OH

CH-CH2-OH

(CH3)2-CH-OH

(CH3)3OH

Potency and turn over are terms related to:

Choose an answer

enzymes

proteins

fats

oils

In which of these processes are small organic molecules changed into macromolecules?

Choose an answer

the fractional distillation of crude oil

the cracking of petroleum fractions

the hydrolysis of proteins

the polymerization

The attractive forces which exist between ionic compounds and water molecules are

Choose an answer

dipole-dipole forces

ion diopole forces

istantaneous dipole-induced dipole forces

dipole-induced dipole forces

How many secondary carbon atoms are present in Methylcylopropand

Choose an answer

1

2

3

0

The diffusion of gasses at absolute zero will be:

Choose an answer

Slightly decrease

unchanged

Slightly increased

Zero

If similar groups are attached to the same side, of C=C of alkene then it is

Choose an answer

Cis isomer

Trans isomer

Tautomer

AIl

The maximum number of isomer for an alkene with the molecular formula C2H8

Choose an answer

2

3

4

5

The no. of Ip's on oxygen in CO are

Choose an answer

1

3

4

2

Which order of vapour pressure in the following liquids is correct

Choose an answer

water > ethanol > acetone > ether

ether > acetone > ethanol > water

ether > ethanol > acetone > water

water > ether > acetone > ethanol

The reason that diamond and graphite have different physical properties is

Choose an answer

density

color

bonding

hardness

Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is

Choose an answer

2: 1

1: 2

3: 1

4: 1

Half of the mass of atmosphere is concentrated above earth at the hieght of

Choose an answer

40 Km

25-28 Km

5-6 Km

100 Km

If pressure is increased from a 2 atm to 4 atm on a gas then its volume will decrease from:

Choose an answer

3L to 1L

4L to 2L

6L to 4L

8L to 2L

What is effect of polluted air on enviroment:

Choose an answer

Ozone

Global warming

Acid rain

Smog

Which one of the following does not show isomerism?

Choose an answer

Propane

Hexane

Butane

Pentane

What is not true for NH4CI

Choose an answer

It has ionic bond

It has covalent bond

It has coordinate bond

It has hydrogen bond

One of the following is a ionic solid. Which is that?

Choose an answer

Fe

KBr

Diamond

Cr

The B.P. of compound is mostly raised by

Choose an answer

dipole-induced dipole interactions

london dispersion forces

intramolecular H-bonding

intermolecular H-bonding

D-block elements are also called

Choose an answer

Non-typical transition element

Outer transition elements

Abnormal transition elements

Inner transition

The isomerism in which the compounds differ with respect to functional group but have same molecular formula is called

Choose an answer

Metamerism

Functional group isomerism

Position isomerism

Chain isomerism

pi-bond can be formed by sideways overlap of

Choose an answer

s-orbital

d-orbital

p-orbital

sp orbital

Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by

Choose an answer

Cannizzaro's Reaction

Aldol Condensation

Kirchhoff Rule

Markownikov's Rule

One mole of SO2 contains

Choose an answer

6.022 x 10(23) atoms of oxygen

6.022x 10 ê23 atoms of sulfur

18.1x 10 (23) molecules of SO2

4 g molecule of SO2

Coenzymes are the species which increase the activity of enzymes. They are chemically

Choose an answer

Metal ions

non-metals

Organic acids

Organic bases

Which one increases by common ion effect except?

Choose an answer

Crystallization

Solubility

Association of ions

All of these

To become a carbohydrate a compound must contain

Choose an answer

2-carbon

3-carbon

4-carbon

5-carbon

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

Choose an answer

Atmosphere

Lithosphere

Hydrosphere

Biosphere

According to Lowery Bronsted concept, which of the following is considered as an acid?

Choose an answer

BF3

OH-

H3O+

Cl-

Monosaccharides belong to the group

Choose an answer

lipids

fats

proteins

carbohydrates

To which of the following mixtures Dalton's law of partial pressures is not applicable?

Choose an answer

CO and CO₂

CO₂ and N₂

CH₄ and C₂H₆

HCI and NH₃

RNA is a polymer of a nucleotide which consist of three components. Which one is not the component in the nucleotide of an RNA

Choose an answer

D-Ribose

wracil base

prosphate group

thyamine base

Air can be distilled fractionally because the constiltuents of the air:

Choose an answer

have different densities

can be liquefied

are gases at room temperature

have different boiling points

Which is trigonal cyrstal

Choose an answer

BaSO₄. 4H₂O

FeSO₄

NaNO₃

None

Which element differs from rest of elements of its group?

Choose an answer

Ba

Mg

Ca

Be

If empirical formula of a compound is CH2 and its molecular mass is 56amu. What will beits molecular formula

Choose an answer

CH2

C3H6

C2H4

C4H8

Which of the following species is used to formation of glycerol fatty acid from triglyceride

Choose an answer

NaOH

Ni

Lipase

All

Water exist in only

Choose an answer

One state

Two state

Three states

4 states

Which of these polymers is an addition polymer?

Choose an answer

nylon 6,6

Polystyrene

terylene

epoxy resin

A term to express the partial pressure of water vapours in a gas is known as

Choose an answer

vapour pressure

aqueous tension

partial pressure

moisture

In the atmosphere, O₂is about

Choose an answer

10%

15%

21%

25%

What is the sequence of electron take up and removal from 4s orbital a transition metal in 3d series?

Choose an answer

Enters first, leaves after 3d electrons removal

Enters after 3d electrons, leaves after 3d electrons

Enters after 3d eleetrons, leaves first

Enters first and leaves first

The acidity of phenol is due to its

Choose an answer

Nature of Benzene

Double bond in benzene ring

Natute of phenoxide ion

Hydroxyl group

Water may boil at 120 °C when external pressure is:

Choose an answer

100 mm of Hg

700 mm of Hg

760 mm of Hg

1489 mm of Hg

Which one of the following statements is wrong for gases?

Choose an answer

gases do not have a definite shape and volume

volume of the gas is equal to volume of container confining the gas

confirmed gas exerts uniform pressure on the walls of its container in which it is enclosed

mass of gas cannot be determined by weighing a container in which it is enclosed

Amino acids which contain two amino groups are called

Choose an answer

Acidic amino acids

Basic amino acids

Neutral amino acids

Amphoteric amino acids

NaCI is completely ionized in water due to the presence of:

Choose an answer

dipole-dipole forces

ion- dipole forces

H-bonding

London dispersimforces

Which of the following is an example of body centred cube?

Choose an answer

Magnesium

Zinc

Copper

Sodium

The rate of diffusion of a gas is inversely proportional to:

Choose an answer

Density of a gas

Velocity of the gas

Viscosity of the gas

All of above

Theoretically, the temperature at which volume of gas become equal to zero is called

Choose an answer

Boiling point of water

Zero absolute

Zero Kelvin

both B and C

Formula of sodium beryllite is

Choose an answer

Na2B4O7

Na2BeO2

BeONa

Na2B4O7 .10 H2O

Starch is a polymer is of:

Choose an answer

sucrose

fructose

α-D-Glucose

lactose

At compromise distance the forces dominating between atoms are

Choose an answer

repulsive forces

attractive forces

Dipole induced dipole force

H-bonding

A pressure of 1Nm^-2 is equal to:

Choose an answer

one bar

one pascal

stalagmometer

one aomosphere

Ozone layer is

Choose an answer

25 - 28 km high

26 - 29 km high

24 - 27 km high

20 - 28 km high

Fatty acids are:

Choose an answer

Aliphatic mono-carboxylic acids

Di-carboxylic acids

Tri-carboxylic acids

Tetra carboxylic acids

Poly carboxylic acids

Which of the following wast material is not recycled for use again?

Choose an answer

glasses

paper

plastic toys

hides of animals

An amine is produced in the following reaction
C2H5l+2NH3-------C2H5NH2 +NH4l. What is mechanism?

Choose an answer

Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Factors affected denaturation of proteins:

Choose an answer

Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

Water soluble component of starch is

Choose an answer

Amylose

Amylopectin

Both

Cellulose

Substances that tend to decrease the activity of enzymes are called

Choose an answer

coenzyme

activators

inhibitors

apoenzyme

The bond angle between any two sp hybrid orbitals is A.109.28°

Choose an answer

107.09°

120°

90°

80°

The oxidation state of carbon in C2O-²4 is

Choose an answer

+4

-4

+3

+2

Which of the following is a non-typical transition element?

Choose an answer

Cr

Zn

Mn

Fe

The % age of nitrogen in ammonia is:

Choose an answer

80%

92%

90%

50%

In purification of potable water the coagulant used is:

Choose an answer

Nickel sulphate

Copper sulphate

Barium sulphate

Aluminium sulphate

If volume of an ideal gas at 0°C 536cm3, what is volume at 1°C

Choose an answer

373 cm3

646 cm3

Becomes 0cm3

746 cm3

The incineration may reduce volume of wastes upto:

Choose an answer

1/4th

1/2nd

2/3rd

3/4th

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:

Choose an answer

fiber

plastic

varnish

polyamide resin

First order of protein structure refers to

Choose an answer

Bending of protein chain

Number and sequence of amino acids

Three dimensional structure of protein

Site of disulfide bonds

Hardness which can be removed by boiling is called

Choose an answer

Permanent hardness

Temporary hardness

Stiffness

Toughness

In which of the following techniques rate of reaction is directly related with number ofions

Choose an answer

Spectrometry

Dilatometric method

Conductometric method

Refractometric method

Vegetables oils are

Choose an answer

Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

A basic buffer solution can be prepared by mixing

Choose an answer

Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Weak acid and its salt with strong base

[Ti (H20)6]3+ ion isin colour.

Choose an answer

Yellow

Blue

Violet

Red

To measure the true pressure of a gas collected over water, the pressure due to water vapoure is:

Choose an answer

added to the total pressure

multiplied to the total pressure

divided by the total pressure

subtracted form the total pressure

At constant temperature, volume of given mass of a gas is inversely proportional to pressure on it. This is statement of

Choose an answer

Charles law

Boyle's law

Hooks law

Grahams law

Zn has

Choose an answer

Zero unpaired electrons

Three unpaired electrons

Five unpaired electrons

One paired electrons

The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears.The behaviour is a characteristic of substance forming

Choose an answer

Allotropic crystal

Liquid crystals

Isomeric crystals

Isomorphous crystals

In MgCl2, the oxidation state ofCI is

Choose an answer

Zero

-2

+2

-1

Monosacharide belong to the group

Choose an answer

Fats

Carbohydrates

Lipids

Proteins

How should the conditions be changed to prevent the volume of a given gas from expanding when its mass in increased

Choose an answer

temperature is lowered and pressure is increased

temperature is increased and pressured is lowered

temperature and pressure both are lowered

temperature and pressure both are increased

Born-Haber cycle is an application of

Choose an answer

Hess's law

1" law of thermodynamics

Avogadro's law

1law of thermochemistry

Butane has isomeric forms

Choose an answer

3

4

2

1

The boiling point of radon (211k)id higher than boiling point of helium (4.4k). This is due to the reason that:

Choose an answer

the atomic mass Rn is larger than that of He

the dispersion forces between Rn atoms are more prominent than between he atoms

rn atomic number of Rn is larger than that of He

Liquefaction of gas can only be carried out if the:

Choose an answer

without caring for the value critical volume at critical stage

the temperature is more than critical and pressure is 1000 atm

the temperature is below the critical and pressure is very high

temperature is above the critical temperature and pressure can have any value

Detergents are

Choose an answer

synthetic products

natural products

both a and b

none of the above

Joule is a unit of energy which is defied as

Choose an answer

Kgm^-2s^-2

Kgm²s^-1

Kgms^-2

Kgm²s^-2

When vapour pressure is equal to atmospheric pressure than it is called

Choose an answer

Evaporation

M.P

B.P

Freezing point

Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4

Choose an answer

I-propanol

2-Methyl-2-propanol

2-propanol

Ethanol

What is the pressure of 2 mole of NH₃ at 27°C when its volume is 5 lit.in Van der Waals equation?(a = 0,17,b = 0.03711)

Choose an answer

10.33 atm

9.333 atm

9.74 atm

9.2 atm

Identify the linear polymer out of following

Choose an answer

Amylose

Amylopectin

Starch

Glycogen

Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?

Choose an answer

Cr+3

Ni+2

Co+2

Fe+3

Which one of the following is a water soluble vitamin?

Choose an answer

niacin

rioflavin

trypsin

ascorobic acid

what is the exact value of angle in BF3

Choose an answer

90

104.51

119.5

120°

The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called

Choose an answer

Heat of reaction

Heat of formation

Heat of atomization

Heat of combustion

The reaction C2H5CI + aqueous KOH---------C2H5OH+ KCI is

Choose an answer

Electrophilic addition

Nucleophilic addition

Electrophilic substitution

Nucleophilic substitution

Which reactant does hnof liberate water on reaction with alcohol

Choose an answer

NH3

K2Cr2O7/15H2O

HCI

PCI3

The electrical conductivity of the metals decreases with the increasing temperature. This is because

Choose an answer

the number of free electrons decrease

the bonds of the metal atoms become weak

the to and fro motion of the metal ions decrease

the increase of to and fro motion of the metal ions hinders the free movement of electrons

Cholestryl benzoate tums into milky liquid at

Choose an answer

140°C

145°C

148C°

149°C

The radioactive disintegration of 238U92 is

Choose an answer

First order

Second order

Third order

Zero order

Which of the following is not a postulate of the kinetic theory of gases?

Choose an answer

when gas particles collide, their total kinetic energy increases

gases consist of molecules in a constant state of random motion

when gas particles collide their total kinetic energy does not change at all

The gas particles travel in straight lines unit they collide with one another or with the walls of the container

Methyl mercaptan, CH₃SH, is one of the substances responsible for bad breath and is often used to impart a smell to natural gas in a pipeline.
What will be formed when CH₃SH is burned in an excess of air?

Choose an answer

CO CO₂ H₂S

CO H₂O SO₃

CO₂ H₂O SO₂

CO₂ H₂O SO₃

When does average rate become equal to instantaneous rate of reaction

Choose an answer

At the start of reaction

time interval is zero

at the end of reactior

time interval approaches zero

A fat or oil is characterised for extent of unsaturation by one of the following number,which one

Choose an answer

rancidity number

acid number

iodine number

saponicfication number

For an ideal gas,number of moles per litre in terms of its pressure P,gas constant R and temperature T is

Choose an answer

PT/R

PRT

P/RT

RT/P

N terminal of glutathione is

Choose an answer

Glycine

Cysteine

Glutamate

Aspartate

consider the physical properties of the gases. Which of the following statements about particles of gases is incorrect? The particles are:

Choose an answer

causing pressure

having wide spaces

orderly arranged

randomly moving

Most of the reactions which give stable products are

Choose an answer

Endothermic

Exothermic

Isothermal

Non of these

The kinetic energy of 4 moles of nitrogen gas at 127°C is? cals.(R = 2 cal mol^-1 K^-1)

Choose an answer

4400

3200

4800

1524

Two or more similar monomers combine to form:

Choose an answer

Homopolymer

Copolymer

Ter polymer

Thermoplastic polymer

Which of the following is not a property of crystalline solid

Choose an answer

geometric shape

cleavage plane

anisotropy

isomerism

An ideal gas cannot be liquefied because

Choose an answer

Its critical temperature is always above 0°C

Its molecules are relatively small in size

It solidifies before becoming a liquid

Forces operative between its molecules are negligible.

How much pesticides have been synthesized at present?

Choose an answer

Four thousand

Six thousand

Eight thousand

Ten thousand

^{Reaction of ethyl bromide with ammonia}

Choose an answer

Completes in a single step

Completes in two steps

Continues till N is left with no lone pair

is reversible

The electrochemical reactions occurring at both the electrodes along with the electrolytic conduction constitute

Choose an answer

Oxidation

reduction

Redox reaction

electrolysis

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

Choose an answer

Blow air

Add Na₂CO₃

Use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

During the electrolysis of Fused NaCI, the products are

Choose an answer

Na and H2

Na and Cl2

Na and O2

H2 and Cl2

An ideal gas, obeying Kinetic theory of gases cannot be liquified, because

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its critical temperature is above 0°C

its molecules are relatively small in size

It solidifies before becoming a liquid

Forces acting between its molecules are negligible

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

For a chemical reaction in which one of the reactant also act as solvent, the order will be

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First order

Third order

Second order

pseudo-first order

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

Which one of the following enzymes brings about the hydrolysis of fats?

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Urease

Maltase

Zymase

Lypase

Which one of the following is an organic compound?

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Calcium carbide

Calcium cyanide

Carbon disulphide

None of these

When the temperature is raised, the viscosity of the liquid decreases.This is because of

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Decreased volume of the solution

Increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Increased attraction between the moelcules

CFCs are mainly used in industries due to

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Low cost

Gaseous nature

High reactivity

Un stability

Which of these polymers is a synthetic polymer

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Animal fat

Strach

Cellulose

Polyester

Which Henderson equation is not correct?

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pH= pKa +log [ salt/acid]

pH = pKa - log [ salt/acid ]

pH= pKa - log[ acid/salt ]

Pka = pH - log [ salt/acid ]

How many zones through which the charge passes in a rotary kiln?

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4

3

2

5

The gas which obeys the gas laws at all conditions of temperature and pressure is

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ideal gas

perfect gas

real gas

noble gas

The standard reduction potential of Zinc is

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0.76V

0.34

-0.34V

-0.76V

What is the co-ordination number of face centered cubic structure?

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12

8

6

10

The conc.of dissolved molecular oxygen in water which act as the most important oxidizing agent ranges from:

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2ppm- 6ppm

4ppm--8ppm

2ppm--- 4ppm

2ppm --3ppm

Splitting of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

Cotton is __________ % cellulose

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90

100

99

30

The existence of a substance in more than one solid modification is known as

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Isomorphism

Polymorphism

Amorphism

None of these

Which of the following is a simple protein

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Albumins

Legumin

Callogen

All

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

Insoluble ferric oxide is produced in the pH range:

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1 to 8

6 to 9

3 to 13

8 to 13

The number of moles of H2 in 0.224 L of hydrogen gas at STP (273 K, 1 atm) assuming ideal gas behaviour is

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1

0.1

0.01

0.001

Out of total amount of water available for human use is

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0.30%

0.2%

40%

50%

Increase viscosity of proteins is due to

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Denaturation

Isoelectric point

Both

None

Dipole-dipole forces are present between:

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non-polar molecules

polar molecules

both polar and non-polar

none pf above

Hydrogen bonding is not present in which of following compound?

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Ammonia

Ethanol

Ether

Water

The elements like calcium nitrogen and phosphorus added into the soil in large amounts are called:

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basic elements

trace elements

additives

nutrient element

Proteins have linkage between amino acids

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imide

amide

ester

ether

CH3CH2CH2OH--------A---------B Here B is

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Propyne

Propanal

Propene

Propane

Molecular mass of PVC is (DP = 1200)

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63000

75000

75600

80,000