Question # 1

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Proper fraction

Improper fraction

Rational fraction

None of these

The probability that the sum of dots appearing in two successive thrown of two dice, in every time 7 is

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1/5

1/36

1/7

1/63

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-2

-1

1

2

The centre of the conic x2 +16x +4y2 -16y +76 =0 is

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(0,10)

(-8,4)

(-8,-2)

(1,1)

Sin 90° = ______

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-1

0

1

Undefined

Domain of cotθis

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∀x∈(a,b),f(x) is increasing if

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f′(x) >0

f′(x) <0

f′′(x) >0

f′′(x) =0

The 6th term of the sequence 7,9,12,16......is

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27

32

20

19

sin[cot^-1{cos(tan^-1x)}]=

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What is the period of tan 4/3 x =?

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π/4

4π/3

7π/4

3π/4

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1, 1/2, 0

1, 2, 1

1, 2, 3

1, 2, 0

A non-homogeneous linear system AX = B has no solution if

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|A| = 0

|A|≠ 0

Rank (a) = no of variables

Rank > no of variables

Five engineering, four mathematics, two chemistry books are placed on a table at random.The probability that the books of each kind are all together is

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The fifth term of the sequence a_n= 2n + 3 is ______

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13

-13

8

3

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0

-1

1

2

The square root of 2i - 20i is

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+-(5 - 2i)

+-(5 + 2i)

(5 - 2i)

None of these

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sec x tan x

cos²x

sin²x

sec²x

graph of trigonometric function y = sec x does not meet

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x - axis

y -axis

both axis

None of these

Find the next two terms of 7, 9, 12, 16,...

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18, 20

19, 22

20, 25

21, 27

The number of x-intercepts of y= sin x in his period

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0

1

2

3

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3

6

0

None of these

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sin (2π-θ)

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cosθ

sinθ

tanθ

-sinθ

The value of i⁴ⁿ⁺¹

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1

-1

i

i²

The equation ax²+ 2hxy + by²+2gx + 2fy + c =0 represents an ellipse if

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The differential equation of all st. lines which are at a constant distance to form the origin is

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The modulus of a vector i-i+ k is:

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√3

1

√2

∞

0! = ______

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0

1

2

Not defined

cos(π/2-θ) = ________;

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cosθ

sinθ

-cosθ

-sinθ

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If x - 1 is a factor of x4 - 5x2 + 4 then other factor is

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(x + 2)2(x - 1)

(x + 2)(x - 1)2

(x+2)(x2- x- 2)

(x + 2)2(x - 1)2

The no of term is the expansion of (a+x)n-1 is

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n+1

n-1

n

n-2

The product of the four fourth roots of unity is

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0

1

-1

None of these

Which of the following is not a unit vector

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[1, 1, 1]

[0, 1, 0]

[0, 0, 1]

[1, 0, 0]

A vertical pole is 8m high and the length of its shadow is 6m. The angle of elevation of the sun of the moment is

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57𝜊

-48𝜊

27𝜊

53𝜊

For what value of k, 3x -2y+ k= 0 is tangent to the circle x2 +y2 +6x -4y =0

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k=0

k=0 or 26

k = 26

k=-13

The multiplicative inverse of x such that x = 0 is

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-x

does not exist

1/x

0

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Two circle s1: x2+ y2 +2x- 2y- 7= 0: s2: x2+ y2- 6x+ 4y+ 9= 0

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Touch externally

Touch internally

Intersects each other

Do not intersects

The set {1, 2, 3, 4, ....} is called

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Set of Natural numbers

Set of whole numbers

Set of rational number

Set of irrational numbers

w¹⁵= ______

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0

1

w

w²

The period of|sin⁡2x| is

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π/2

-π/2

π

π/3

In an A.P,a +(n-a)d is

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1st term

General term

Last term

None of these

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Which of the following is a scalar.

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electric field

magnetic field

weight

mass

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The equation of the line perpendicular to x- axis and passing through (-5,3) is

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y -3 =0

x+ 3 =0

y- 3 =∞

x +5 =0

The horizontal distance between the two towers is 60 m. the angular elevation of the top of the taller tower as seen from the top of the shorter one is 30°. If the height of the taller tower is 150 m, the height of the shorter one is

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116 m

200 m

216 m

None of these

A tower subtends an angle of 30° at a point distant d from the foot of the tower and on the same level as the foot of the tower. At a second point, h vertically above the firs, the angle of depression of the foot of the tower, is 60°. The height of the tower is

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h/3

h/3d

3h

3h / d

The roots of (b-c)x2+(c-a) x+a-b=0 are equal if

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2b = a+c

2a = b+c

2c = a+b

a + b + c =0

For any set B,B∪B' is

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Is set B

Set B'

Universal set

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The element range of sequence are called

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Series

progression

Members

Terms

If A = {x/x is a positive integer and 4≤x<23}, then A=

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{1,2,3,4,5,6,7}

{4,5,6...........22}

{1,2,3,.........23}

{1,2,3,4,5}

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cosec x + c

-cosec x + c

-sec x + c

sec x + c

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direction ratios

direction cosines

direction angles

none of these

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If distance of (a,b) from y-axis is 2 then

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a = 2

b = 2

a = b

a = 4

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A

B

A'

None of these

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The set of points {(x,y)|y = f(x),∀x∈} is called

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Relation

Graph of f

Function

All are correct

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Given two independent event A and B such that P(A) = 0.30 and P(B) = 0.60. Probability of getting neither A nor B is

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0.28

0.13

0.12

0.42

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x = 3

x = 1/5

x = 0

None of these

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The length of perpendicular from (3,1) to 4x +3y +20 =0 is

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6

7

3

8

If (0, 0) and (0, -1) are end points of a diameter, then the equation of the circle is

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In one hour, the hour hand of a clock turns through

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A point of a solution region where two of its boundary lines intersect, is called

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Boundary

Inequality

Half plane

Vertex

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1

-1

In (x + iy), y is called as

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Imaginary part

Complex number

Real part

None of above

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G.P

H.P.

A.P.

No particular sequence

A square matrix A for which A^t= -A is called a

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Column matrix

Symmetric matrix

Skew-symmetric matrix

Row matrix

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π / 3

π / 4

π / 6

0

A triangle has six

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side

elements

angle

tangents

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N

r

2r

π

A and B throw a dice. The probability that A's throw is not greater then B's is

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5 / 12

7 / 12

1 / 6

1 / 2

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a tan(ax + b) + c

- a tan(ax + b) + c

The period sin²θis

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π²

π

2π

π/2

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x²+ x - 6 = 0 is

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An equation

An identity

A polynomial

None of these

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0

1

2

3

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If #n = (n-5)²+ 5, then find #3 x #4.

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54

12

4

9

The directrix of y2 =-4ax is

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y =-a

y = a

x = a

x = -a

The velocity of a particle moving along a straight line is given by v = 3t + t². The acceleration of the particle after 4 seconds from the start is

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4

11

26

None

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Only one of the root of ax2 + bx + c =0, a≠ 0 is zero if

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c = 0

c = 0,b≠ 0

b = 0,c = 0

b = 0,c≠ 0

Which of the following statements is not true?

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Isotopes with even atomic masses are comparatively abundant

Isotopes with even atomic masses and even atomic numbers are comparatively abundant

Isotopes with even atomic masses and odd atomic number are comparatively abundant

75% plant nutrients are present in the fertilizer:

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Urea

NH₄NO₃

NH₃

(NH₄)₂HPO₄

Which statement in not correct about alcohol?

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Ethyl alcohol is heavier than water

Ethyl alcohol ecaporates more quickly

Alcohol with less number of carbon atoms is more soluble in water than alcohol with more number of carbons atoms

Alcohol produces H₂by reaction with sodium metal

Aldelydes are the oxidation product of

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P-alcohols

s-alcohols

ter-alcohols

carboxylic acids

Alkanes normally have ______ hybridization

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Sp

Sp²

Sp³

d sp³

Which compound is more soluble in water

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C₂H₅OH

C₆H₅OH

CH₃OCH₃

n-hexanol

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Elimination Esterification

Elimination Isomerisation

Oxidation Exterification

Oxidation Oxidation

Which is the longest period of the periodic table

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5th

7th

6th

2nd

The term aromatic was derives from

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Greek word

Latin

Russian

English

The natural fertilizers consist of

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Plants

Animals

Both plants and animals

Microorganisms

How does the ionization energy of 1st group elements vary?

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Increases down the group

Decreases down the group

Remains unchanged

Variation is not regular

The best electrode used in salt bridge is KCl. Which other electrolyte an also be used for the purpose :

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NaCl

NH₄NO₃

KNO₃

NaNO₃

Dehydrohalogenation of alkyl halides give

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Alkanes

Alkenes

Alkynes

Alkdehyde

Solvent extraction method is a particularly useful technique of separation when the product to be separated is:

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non-volatile or thermally unstable.

volatile or thermally stable.

non-volatile or thermally stable.

volatile or thermally unstable.

Most common oxidation states shownby cerium are

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+2, +4

+3, +4

+3, +5

+2, +3

The organic compounds containing Ph-OH group are called:

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Phenol

aldehyde

Keton

Carboxylic acids

In a group of periodic table, atomic radii is:

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Remains some.

Increases.

First decreases then increases.

Decreases.

Result of ozone hole is

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Green house effect

Global warming

Acid rain

UV rays reach the earth

Acetylene had a characteristic ethereal smell resembling that of

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Ginger

Vinegar

Garlic

Onion

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

As compared to molar solution, in the molal solution the quantity of solvent is :

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Comparatively lesser

More or less equal

Comparatively greater

Very large

Which of the following will have the highest boiling point?

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Methanal

Ethanal

Propanal

2-Hexanone

Rutherford's experiment led to the discovery of

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Nucleus

Electron

Proton

alpha particle

Which of the following compound is industrially prepared by the electrolysis of solution of NaCl

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Na₂CO₃

NaHCO3

NaOH

NaOCl

Which of the sub-atomic particles is not charged

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Electron

Proton

Neutron

All of them

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0

1

2

3

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

The value of activation energy Ea of a reaction can be determined from the value of slope of the straight line obtained by plotting a graph between 1/T and log k. the value of Ea is equal to

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Slope

1/Slope

Slope x R

Slope x 2.303 R

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NH₃ HCl

KCN in C₂H₅OH NaOH

KCN in C₂H₅OH HCl

HCN NaOH

The number of atoms present in molecule determines its:

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Molecularity

Atomicity

Basicity

Acidity

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Treatment with HCN followed by acid hydrolysis

Oxidation of acetaldehyde followed by basic hydrolysis

Treatment with HCN followed by reduction

Treatment with HCN followed by oxidation

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

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Ethylene polymerizes at 100 atm pressure and 400°C to give

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Polybenzene

Polyalcohol

Polypropylene

Polyethylene

Primary carbon attaches with other hydrogen atoms directly:

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One

Two

Three

At least one or more than it

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

Charge to mass ratio of electron was discovered by:

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Millika.

Rutherford.

J.J. Thomson.

Chadwick.

In which of the following pairs, the numbers of electrons in the outermost shell are different?

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As,Sb

Ge,Sn

In,pt

Se,Te

How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

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1

2

3

4

In an exothermic reaction, a 10° rise in temperature will

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Decrease the value of equilibrium constant

Double the value of K_c

Not produce any change in K_c

Produce some increase in K_c

Water is purified by the process:

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Aeration

Coagulation

Chlorination

All of these

The unit of rate of reaction is

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mole dm^-3

mole Kg^-1

moles dm^-3sec^-1

grams dm^-3

Which has soapy touch?

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Na2B4O7

H3BO3

Ca2B6O11

HBO2

During electrolysis of KNO₃, H₂is evolved

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Anode

Cathode

Both a and b

None

An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B . Compound B gives blue colour salt in Victor Meyer's test.The compounds A and B are respectively

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Acetaldehyde, tertiary butyl alcohol

Acetaldehyde, ethyl alcohol

Acetaldehyde, isopropyl alcohol

Acetone, isopropyl alcohol

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Absolute alcohol is obtained by adding rectified apirit in alcohol:

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Water

Na₂CO₃

NaOH

CaO

The size of electronic shell is described by

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Azimuthal Q. no

Magnetic Q.No

Spin Q. No

Principle Q. No

Hydrolysis of alkyl nitriles gives:

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alkane

alkyl halide

alkyl nitride

carboxylic acids

In 1000 molecules of 0.001 M acetic acid the number of H⁺ions is 12.6, then its percentage of ionization is

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1.33%

1.26%

12.6

1%

Sodium is never found free in nature because of its

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Chemical reactivity

Small ionic size

Small atomic volume

None of these

Linear shape is associated with which set of hybrid orbitals

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sp

sp²

sp³

dsp²

When potassium metal is exposed to violet light

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Ejection of electrons takes place

Ejection of some potassium atoms occurs

There is no effect

The absorption of electrons takes place

Which statement about an atom is true ?

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The number of neutrons is not equal to number of electrons

Mass number is less than atomic number

All the elements have only one mass number

Mass number can be equal to atomic number

Ammonium nitrate fertilizer is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

The strongest acid among the following aromatic compound is

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Ortho-nitrophenol

Para-chlorophenol

Para-nitrophenol

Meta-nitrophenol

The reaction rate is expressed in the units of

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Mol dm^-3S^-

Mol dm^-3

Mol dm^-3N^-

dm^-3S^-

Which of the following compounds will not react with sodium metal to release hydrogen

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CH₃CH₂CH₃

CH₃CH₂OH

C₆H₅OH

C₆H₅CH₂OH

According to Mendeleev, the properties of the elements are periodic function of their

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Atomic number

Atomic volumes

Atomic masses

Atomic densities

During dehydration of alcohols to alkenes by heating with conc. H₂SO₄, the initial step is

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Formation of an ester

Protonation of alcohol molecule

Formation of carbocation

Elimination of water

How many mole of acidfied FeSO₄solution can be completely oxidized by one mole of KMNO₄?

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10

5

6

2

Which of the following orbitals have a dumb bell shape?

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s

p

d

f

When a bond breaks

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Heat is evolved

Heat is absorbs

No change in heat contents takes place

Temperature increases

The hydrocarbon used for polymerization is

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Alkanes

Alkenes

Alkynes

All of above

Na₂O is

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Acidic

Basic

Neutral

Amphoteric

The quantum number which describe the orientation of the orbitals is

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Spin quantum number

Principle quantum number

Azimathal quantum number

Magnetic quantum number

Fe can displace Cu form CuSO4solution because

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Fe is ferromagnetic

Fe is below Cu in electrochemical series

Fe is above Cu in electrochemical series

Fe exists in divalent oxidation state

When an electron is added to a uni positive ion we get:

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Cation

Molecule

Neutral atom

Anion

The substances which soften the polymer are called

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Stabilizers

Plasticizers

Retarders

Pigments

Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

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Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

I-Chloropropane has two isomers, it is an example of

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Chain isomerism

Position isomerism

Functional group isomerism

Metamerism

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Potable water is considered to be

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Safe for human consumption

Not safe for human consumption

The surface water

The ground water

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

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Ozone

Nitrous oxide

Sulphure dioxide

Carbon monoxide

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

What is the packet of energy called?

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Electron

Photon

Positron

Proton

During oxidation in k₂Cr₂O_{7, Cr VI changes to :}

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I

II

III

IV

The chemical formula of gypsum is

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CaSO₄. 5H₂O

CaSO₄. 4H₂O

CaSO₄. 2H₂O

None of these

Which of the following is a tetrabasic acid?

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ORthophosphoric acid

Hyposphosphorus acid

Metaphosphoric

Pyrophosphoric acid

One calorie is equal to

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5.184 J

3.184 J

4.184 J

7.184 J

The number of subatomic particles in atoms sidcovered is more than:

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110

100

125

90

Under what condition of temperature and pressure the formation of atomic hydrogen from molecular hydrogen will be favourd

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High temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

:Low temperature and high pressure

The boiling point of an a zeotropic mixture of water and ethye alcohol is less than that of water and alcohol. The mixture shows

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That solution is highly saturated

No deviation from Raoult's law

Positive deviation from Raoult's law

Negative deviation from Raoult's law

Which of the following statement is not related to Solvay's process of Na₂CO₃

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Cheap materials

Pure product

Continuous process

Harmful by-products

Choose an answer

Introduction of an inert gas at constant volume

Introduction of PCl₃(g) at constant

Introduction of PCl₅(g) at constant volume

Introduction of Cl₂at constant volume

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Urea has concentration when prepared before prlilling:

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46%

82%

99.7%

100%

Rutherford's atomic model suggests the existence of

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Atom

Nucleus

alpha particle

Measons

The 95.5% mass of Lithosphone is made of 11 elements i.e. O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. which element is present in trace amount

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Iodine

Bromine

Lead

Carbon

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

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Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Choose an answer

Aqueous bromine

Dilute HNO₃

Dilute HCI

CH₃COCI

Ammonia contains nitrogen in it:

Choose an answer

46%

50%

80%

82%

Molarity of pure water is :

Choose an answer

33.3

55.5

44.4

66.6

Reactions that proceed on both sides and never go to completion are called

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Irreversible reactions

Reversible reactions

Opposing reactions

Spontaneous reactions

Value of rate constant k is specific for a reaction, and varies from reaction to reaction. The value of k of a reaction changes with

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Time

Temperature

Concentration of reactants

Order of reaction

In the chemical combination of hydrogen and fluorine to form HF:

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Sodium atom donates major share of its electrons.

Hydrogen atom donates the major share of its electrons.

Both the atoms share the electrons equally.

None of above.

Geographical survey of Pakistan estimates about billion tons of coal in Pakistan:

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182

183

184

185

The change in concentration of reactant or product per unit time is called :

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Rate constant.

Rate of reaction.

Rate equation.

Rate law.

1-Chlorobutane on reaction with alcoholic potash gives

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But 1-ene

Butan-1-ol

But-2-ene

Butan-2-ol

Stainless steel contains ion and carbon along with

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Ni and Cr

Cr and Co

Co and Mn

Mn and Ni

Strength of magnetic field is measured in SI units, in:

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N

N/Am

Am/N

Nm/A

None of these

Coulomb multiplied by volt by volt gives the unit called:

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farad

Ohm

Second

joule

Watt

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

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Thumb

Curled fingers

Middle finger

Arm of right hand

None of these

The practical application of the phenomenon of Mutual induction is

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Transformers

Generator

Motor

All of these

The potential difference across each resistance in series combination is

Choose an answer

same

different

zero

none of these

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

The electric field due to an infinite long thin wire at a distance R varies as

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1/R

1/R²

R

R²

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

Brownian motion increases due to

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Increase in size of Brownian particle

Increase in temperature of medium

Increase in density of medium

Increase in viscosity of medium

Avo-meter is used of measure the

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current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

In an N-type silicon, which of the following statement is true

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Electrons are majority carriers and trivalent atoms are the dopants

Electrons are minority carriers and pentavalent atoms are the dopants

Holes are minority carriers and pentavalent atoms are the dopants

Holes are majority carriers and trivalent atoms are the dopants

Proton was discovered by Rutherford in

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1915

1906

1910

1920

A monkey sits on the pan of spring scale kept in an elevator. The reading of the spring scale will be maximum when

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Elevator is stationary

Elevator cable breaks and it falls freely towards earth

Elevator accelerates downwards

Elevator accelerates upward

Units of impedance are

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Henry

Ohms

moh

Watt

The counter, which also provides the power to the G.M. tube is called:

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Thin mica window

thin glass window

Airy window

Wooden window

None of these

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

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Increase

Decrease

Remain F

Become 10F/9

The capacity of a parallel plat capacitor depends on the

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Type to metal used

Thickness of plates

Potential applied across the plates

Separation between the plates

NmA^-1is commonly called:

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Weber

Apmere

Guass

Coulomb

None of these

Which of the following quantity for particle executing SHM is non-zero at mean position

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Force

Acceleration

Velocity

Displacement

The direction of velocity is along the direction of

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distance

displacement

acceleration

all of them

transverse wave motion is possible in:

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Air

A mixture of NH₃and O₂

Strings

All of these

The passage of current is accompanied by a magnetic field in the surrounding space:

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Always accompanied

Sometimes accompanied

Never accompanied

Any of above

None of these

If a freely oscillating system is subjected to an external force, then

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free vibrations will take place

the body will move with its natural frequency

forced vibrations will take place

none of them

Light appears to travel in straight line because

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It is not absorbed by the atmosphere

It is refracted by the atmosphere

Its wavelength is very small

Its velocity is very large

A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is

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Zero

Infinity

V

2 V

Semi-conductor elements have atoms with

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2 valence electrons

3 valence electrons

4 valence electrons

5 valence electrons

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

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

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Critical temparature

Temperature of vaporization

Melting point

Both (A) and (C)

Both (A) and (B)

A field in which the work done is moving a body along closed path is zero is called:

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Nuclear filed

Conservative field

Gravitational field

Non-conservative field

The inkjet printer ejects a thin stream of:

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Water

Oil

Ink

Any of above

None of these

The internal pressure of the blood is

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less than the external atmospheric pressure

greater than the external atmospheric pressure

equal to the external atmosphericpressure

none of them

Hertz is unit of:

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Time period

Displacement

Amplitude

Frequency

A signal is amplified at the output without any change of phase, if it is applied at the

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inverting input

non-inverting input

at any of the input

none of these

When the pn-junction is connected reversed biased, its resistance is of the order of

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few ohms

few kilo-ohms

few mega-ohms

few mili-ohms

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

No spark plug is needed in

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petrol engine

diesel engine

both of them

none of them

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

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Fringe width will decrease

Fringe width will increase

Fringe width will remain unchanged

Fringe will become less intense

The obvious effect/s of current is/are:

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Heating effect

Magnetic effect

Chemical effect

Both (C) and (B)

All of these

The output voltage of half wave rectification is in the form of

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a smooth curve

a smooth wave

pulses

all of the above

The velocity of a body at any instant of its motion is known as

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average velocity

instantaneous velocity

uniform velocity

none of them

Amplitude in SHM is equivalent to_____ in circular motion:

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Diameter

Radius

Circumference

None of these

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

Kirchhoff's first rule is also called:

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Loop rule

Thumb rule

Point rule

Right hand rule

None of these

The distance covered by the wave during one period is called its:

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Wave number

Frequency

Wavelength

Time period

During the steady flow, different streamlines

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cannot across each other

can across each other

either of them

neither of them

The vector in space has:

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One component

Two components

Three components

None of these

Which one is related to angular motion:

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Moment of a force

Moment of inertia

Moment of momentum

None of these

In the formula B= µ̻ nl, the symbol n denotes:

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Total number of turns of solenoid

Number of turns per unit length

Number of turns per unit volume

Numbers of turns per unit area

Number of moles

At the present time, the main frontiers of fundamental science are

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2

3

4

5

Consider a photon of continuous X-ray and a photon of characteristics X-ray of same wavelength. Which of the following is/are different for the two photons

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Frequency

Penetrating power

Energy

Method of creation

In rotational motion, analogue of force F us called:

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Couple

Torque

Mass

Moment of intertia

Which of the following quantities remain constant in step up transformer?

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Current

Voltage

Power

Heat

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

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One joule

One erg

One electron volt

None of these

The total reactance of a series RLC circuit at resonance is

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zero

Equal to the resistance

Infinity

Capacitive

The maximum stress that a material can withstand, is known as

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plastic point

elastic limit

yield point

ultimate tensile strength

Through which character we can distinguish the light waves from sound waves

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Interference

Refraction

Polarization

Reflection

When the temperature of source and sink of a heat engine become equal entropy change will be

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Zero

Max

Min

-ve

The relation V = IR represents

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Ampere law

Faraday's law

Ohm's law

Len's law

Taking the earth to be a spherical conductor of diameter 12.8 x 10³km. Its capacity will be

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711μF

611μF

811μF

511μF

The branch of physics which deals with the properties of fundamental particles is called:

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High energy physics

Molecular physics

Astrophysics

Space physics

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

A mass spectrograph sort out

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molecules

atoms

elements

isotopes

If 250V is the RMS value of alternative voltage, then its peak value V_owill be:

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353.5V

250V

175V

zero

400V

Heating effect of current utilized in:

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Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

How much force is required to slide one layer of the liquid over the other layer is measured by

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friction

density

viscosity

resistivity

The contrast in the fringes in an interference pattern depends upon

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Fringe width

Relative difference intensities of the two sources

Distance between the slits

Wavelength

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

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9.4 kHz

940 kHz

94 kHz

None of these

The temperature scale approved in SI units is:

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Celsius scale

Kelvin scale

Fehrenheit scale

None of these

The value of the plank's constant 'h' is given by

Choose an answer

1.6 x 10^-19J

1.67 x 10^-27Kg

6.63 x 10³⁴Js

6.63 x 10^-34Js

The maximum possible error in the reading of an instrument is ______ its least count.

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Half of

Quarter of

Equal to

Double than

The electric flux through any surface depends upon:

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Intensity of electric field

Area of the surface

Angle between intensity and area

All of these

None of these

The pointer of a magnetic compass:

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Is affected only by permanent magnets

Align itself parallel to the applied magnetic field

Vibrates in the magnetic field of the current

Aligns itself perpendicular to the magnetic field

Both (C) and (D)

The results of spectra obtained by Blamer were expressed in 1896 by

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Bohr

Rydberg

Planck

Rutherford

Coulomb

Electrons are

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positive charged

negatively charged

massless

neutral

A solenoid is a coil of wire which is:

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Short, loosely wound, cylindrical

Long, tightly wound, spherical

Long, loosely wound, cylindrical

Long, tightly wound, cylindrical

None of these

A vector which has magnitude 'one' is called:

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Resultant vector

A unit vector

Position vector

None of these

During the free fall motion of an object, when its weight becomes equal to the drag force, then it will move with

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maximum speed

zero speed

maximum speed

none of them

If one of the pipes has a much smaller diameter than the other and are placed horizontally then form both sides of Bernoulli's equation, we can drop the term

Choose an answer

P

1/2 fv²

pgh

none of them

The combined effect of resistance and reactance in a.c. circuit is called

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conductance

resistance

impedance

choke

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

A body moves a distance of 10 m among a straight line under the action of a force of 5 N. If the work done is 25 J, the angle which the force makes with the direction of motion of a body is:

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0°

30°

60°

90°