Question # 1

θ and 2kπ+θ are the ________ angles

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Quadrantal angles

Coterminal

Allied

None

In the interval 0≤ x ≤ π, the sine is

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Not a function

Not defined

Infinity

Not one-to-one function

If sin A = cos A, 0°<A<90° then A is equal to

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1

1/2

0

None of these

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360°

180°

90°

None of these

If a > 0, b > 0, c > 0, then the roots of the equation ax²+ bx + c = 0 are

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Real and negative

Non-real with negative real parts

Real and positive

Nothing can be said

In set builder notation the set {0, 1, 2, ............, 100} can be written as

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1

2

3

4

The sum of co-efficient in (1+x-3x²)⁴¹⁶³is

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0

1

-1

None

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tan(π-θ)=_____;

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tanθ

cotθ

-tanθ

-cotθ

The third term of a G.P. is the square of first term. If the second term is 8, then the 6th term is

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120

124

128

132

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1

-1

Arithmetic mean between a and b is

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Conic sections or simply conics are the curves obtained by cutting a right circular cone by

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a line

two lines

a plane

two planes

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A = B

B = C

A = C

None of these

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Lies between 4 and 7

Lies between 5 and 9

Has no value between 4 and 7

Has no value between 5 and 9

The domain and range of a trigonometric function can be allocate by their

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graph

Continuity

Discontinuity

Periods

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1/2

2

1/4

4

(2 + w) (2 + w²) = ______

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1

2

3

0

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The root of the quadratic equation are

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3

2

1

4

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Identity matrix

Diagonal matrix

Null matrix

Hermitian matrix

3/2 is

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An irrational number

Whole number

A positive integer

A rational number

the latus rectum of the parabola x³= -4ay is:

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x = a

y = -a

x = -a

y = 0

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Parallel to the plane

At right angles to the plane

Lies in the plane

Meet the plane obliquely

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8

1/56

56

None of these

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Set of whole number

Rational Numbers

Complex numbers

Whole numbers

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How many 3 digit numbers can be formed by using each one of the digit 2, 3, 5, 7, 9 only once?

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15

24

60

120

In (x + iy) x is the known as

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Imaginary part of complex number

Real part of complex number

Complex number

None of above

The distance of the point (-2, -3) from the origin is

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2

-5

-3

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(n + 2) (n + 1) n= ______

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The equation |x +4| = x has solution

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x = -2

x = 2

x = -4

x = 4

y=-a is the equation of the directrix of

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y2 =4ax

x2=-4ay

x2=4ay

y2=-4ax

The standard form of the quadratic function f(x) = -x² +4x+2, is

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(x-2)²+6

-(x-2)² + 6

(x-3)²+5

(x+4)²-7

If f(x) = x³- 2x²+ 4x -1 then f(0) is

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0

1

-1

none of these

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-sinθ

cosθ

sinθ

-cosθ

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If 2x +y + λ =0 is normal to parabola y2 =-8x,λ= _____

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12

8

24

-24

How many signals can be given by 5 flags of different colours, using 3 flags at a time

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120

60

24

15

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If 2 tan¹(cos x) = tan^-1(cosec²x), then x is equal to

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π/ 3

π/ 2

π/ 6

π

2π+θwill have terminal side in Quad

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I

II

III

IV

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56

7

8

8/7

The additive inverse of 2/3 is

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3/2

-2/3

-3/2

0

n² - 1 divisible by 8 when n is

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an odd integer

an even integer

Irrational

Prime Number

Three right angles is the angle of measure

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270°

180°

90°

270'

A matrix in which the number of rows is equal to the number of columns is called a

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Diagonal matrix

Rectangular matrix

Square matrix

Scalar matrix

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

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π/4

4π/3

7π/4

3π/4

An infinite sequence has no

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nth term

Last term

Sum

None of these

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9. 8. 7. 6= ______

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The eccentricity of the parabola y²= -8x is

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-2

2

-1

1

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A complex number

A rational number

A natural number

An irrational number

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The period of the function f(x) = sin⁴x + cos⁴x is

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π

π/2

2π

None of these

0 is a symbol of

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singleton set

Empty set

Equivalent set

Infinite set

The transport of a null matrix is

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Row matrix

Column matrix

Square matrix

Null matrix

The product of cube roots of unity is

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Zero

1

-1

None of these

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0

1

-1

None

The period of the trigonometric function y = sin x cos x is

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2π

π

4π

π / 2

An open sentence formed by using the sign of equality "=" is called

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Equation

In equation

True sentence

False sentence

The set of whole numbers is subset of

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The set on integers

The set of natural numbers

{1, 3, 5, 7, ....}

The set of prime numbers

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Cos^-1 12/13 =

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tan^-1 3/5

cot^-1 13/12

Sec^-1 13/12

sin^-1 5/13

5x³+ 3x - is a ______

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Polynomial of degree 3

Polynomial of degree 2

Polynomial of degree 1

Polynomial of degree 0

Derivative of x³w.r.t x is

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0

1

3x²

x³

If 2 and 2 are x and y components of vector then its angle with x-axis is

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30°

45°

60°

90°

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3.5+5.4=5.4+3.5 =8.9 this property of addition is called

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additive identity

assoclative property

commulative property

closure property

2x + 3y > 4 is a linear inequality in

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one variable

two variables

three variables

none of these

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1 degree = _______

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0.00175 rad

0.175 rad

0.0175 rad

1.75 rad

The eccentricity e of an ellipse is always

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Rational

Real

Irrational

Integer

The function {f(x,y)|y = ax2 +bx +c} is

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One-one function

Constant function

Onto function

Quadratic function

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

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13

-13

8

3

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Let A and B be two sets. If every element of A is also an element of B then

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b = c

a = c

b = 0

The direction cosines of any normal to the xy-plane are

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<1, 0, 0>

<0, 1, 0>

<1, 1, 0>

<0, 0, 1>

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The point _________ is in the solution of the inequality 2x + 3y < 5

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(1,1)

(2,2)

(0,1)

(0,2)

tan (π-θ) = ______

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- sinθ

- tanθ

- cosθ

- cotθ

The maximum value of the quadratic function f(x) = 2x2-4x+7,is

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3

5

-3

-5

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a f(x) + c

f(x) + a

Tan^-11/x = ______

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sin x

sec^-1X

cot^-1X

None of these

If distance between (a,2) and (0,0) is 2 then a = _______

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0

2

4

a chord passing through the focus of a parabola is called a:

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Focal chord

Latus rectum

Tangent

Directrix

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7

5

6

None of these

No term of a geometric sequence can be

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0

1

2

3

Matrices A = [aij] 2 x 3 and B = [bij] 3 x 2 are suitable for

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BA

A2

AB

B2

At a point 15 meters away from the base of a 15 meters high house, the angle of elevation of the top is

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90°

60°

30°

45°

Inequalities have ______ symbol

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2

3

4

1

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How many necklaces can be made from 6 beads of different colours?

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120

60

24

15

The process in which water molecules surround solute particles is called

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Hydration

Salvation

Hydrolysis

Dehydration

Sp³hybridization occurs when carbon is bound to

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Four other atoms

Three other atoms

Two other atoms

One other atoms

As it passes into food chain, the concentration of DDT

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Remains same

Decreases

Increases

Unpredictable

The weight of pure NaOH required to prepare 250 cm³of 0.1 N solution is

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4 g

1 g

2 g

5 g

The oxidation number of each element of group l-A is

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0

+1

+2

-1

In molecules kinetic and potential energies are:

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Definite

Moderate

Indefinite

None of above

If the standard electrode potential of CU²⁺/Cu electrode is 0.34 V, what is the electrode potential of 0.01 M concentration of Cu²⁺? (T=298)

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0.399 V

0.281 V

0.222 V

0.176 V

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

The strongest acid among the following aromatic compound is

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Ortho-nitrophenol

Para-chlorophenol

Para-nitrophenol

Meta-nitrophenol

The total number of rare earth elements is

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8

32

14

10

Condensation of aldeydes withα-hydrogen gives:

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Acetal

Ketal

Aldol

Cannizzaro product

Which of the following fluorides does not exists?

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NF₅

PF₅

AsF₅

SbF₅

Isotonic solutions have same

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Molar concentration

Molality

Normality

None of these

The term aromatic was derives from

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Greek word

Latin

Russian

English

A nucleophilic reagent will readily Attack

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Ethylene

Ethanal

Ethanol

Ethylamine

Determination of atomic masses and invention of system of writing symbols was made by:

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J. Berzelius

Democritus

Dalton

None of above

Which of the following compounds does not react with NaHSO₃?

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C₆H₅CHO

Acetophenone

Acetone

Acetaldehyde

Polycyolic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

In thermal decomposition of N₂O the half life period for two different initial concentrations of N₂O are

(i) 255 second for initial N₂O 290 mm Hg

(ii) 212 second for initial N₂O 360 mm Hg then it is

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Zero order

First order

Second order

Third order

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

CL₂, N₂ and O_{2 are:}

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Diatomic molecules

Hetero atomic molecules

Poly-atomic molecules

Mono-atomic molecules

Which of the following is the most suitable method for removing the traces of water from ethanol?

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Reacting with Na metal

Passing dry HCl through it

Distilling it

Reacting with Mg

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

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Pri-alcohol

Sec-Alcohol

Ter-alcohol

Carboxylic

Mustard gas is a :

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Gas

Liquid

Solid

High boiling point

The product of addition polymerization reaction is

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PVC

Nylon

Terylene

Polyamide

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Which of the following oxides is amopheric in character?

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CaO

CO₂

SiO₂

SnO₂

The spectrum of helium is expected to be similar to that of

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H

Li⁺

Na

He⁺

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutral/proton ratio

Cotton is ______% cellulose

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90

100

99

30

Grignard reagent is reactive due to :

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of them

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3

4

5

2

Which statement about Arrhenius equation is incorrect

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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants

Rate of reaction increase by increasing temperature

Rate constant k is increased

Activation energy Ea is decreased by rise in temperature

In the presence of high temperature and pressure peat is converted to:

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Lignite

Polymorphism

Polymerization

Catenation

The boiling point of heavy water is

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108°C

101.4°C

99°C

110°C

Which of the following is correct?

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Reduction of any aldehyde gives secondary alcohol

Reaction of vegetable oil with H₂SO₄gives glycerine

Alcoholic iodine with NaOH gives iodoform

Sucrose on reaction with NaCl gives invert sugar

The quantitative relationship between the substances according to balanced equation describes

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Reversible reactions

Stoichiometry

Limiting reacting

Percentage composition

Decreases om concentration of reactant is denoted by

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dc/dt

-dc/dt

+dc/dt

None

Phosphorus helps the growth of :

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Root

Leave

Stem

Seed

Mercury is the only metal which is liquid at 0°C. this is due to its

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Very high ionization energy and weak metallic bond

Low ionization potential

High atomic weight

High vapour pressure

Every sample of matter with uniform properties and a fixed composition is called a :

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Solid

Liquid.

Phase.

Gas.

The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

The rate of reaction between two specific time intervals is called

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Instantaneous rate

Average rate

Specific rate

Ordinary rate

The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of

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Rault law

Henry law

Dalton law

Grahms law

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RCH(CH₃)CO₂H + CH₃OH

RCH(CH₃)CO₂H + HCO₂H

RCH(CH₃)OH + CO₂

RCH(CH₃)OH + HCO₂H

Lysine is ______ amino acid

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Acidic

Basic

Natural

None of these

Aliphatic carboxylic acids have carboxyl group attached to:

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Alkyl group

Aryl group

Phenyl group

Benzyl lgroup

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Complete conversion of A to B has taken place

Conversion of A to B is only 50% complete

Only 10% conversion of A to B has taken place

The rate of transformation of A to B is just equal to rate of transformation of B to A in the system

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remains constant

Decreases for low value of Z and increase for higher value of Z

At present the number of fertilizers plants in Pakistan are

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10

12

14

20

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

When fused PbBr2 is electrolyzed :

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Lead appears at anode.

Lead appears at cathode.

Bromine appears at cathode.

Lead appears at both electrodes.

Which is not the form of silica?

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Amethyst quatz

Rose quatz

Smoky

None of these

The atomic radius of hydrogen is 37

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Pecometer

Manometer

Angstrom

Micrometer

Which of the following element has the maximum electron affinity?

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F

S

I

Cl

Which of the following expressions show a heterolytic bond fission

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Reactivity of alkyl halides with magnisium is of the order:

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Rl > RBr> RCl > RF

RBr > RCl >RF > Rl

RCL > RF > Rl > RBr

RF >RI >RBr > RII

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

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Kolbe's reaction

Perkin's reaction

Sandmeyer's reaction

Schotten Baumann reaction

Which of the following is not an air

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N₂

N₂O

NO

CO

Oxidation of ter-alcohol gives:

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Aldehyde

Formaldehyde

Ketone

Alkens

Cotton is an example of

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Animal fibre

Mineral fibre

Vegetable fibre

Synthetic fibre

The chemist who synthesized urea form ammonia cyanate was:

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Berzelius

Kolbe

Wohler

Lavoiser

According to VSEPR theory, the shape of the water molecule is

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Octahedral

Distorted tetrahedral

Planar triangle

Linear

Sulphuric acid has great affinity for water because

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It hydrolyses the acid

It decomposes the acid

Acid forms hydrates with water

Acid decomposes water

Which shows maximum catenation property?

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S

Se

Te

O

Which is liquid among the following alkenes?

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Ethane

Propene

Butene

Pentene

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

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Rancidity number

Acid number

Iodine number

Saponicfication number

The radius of ion while considering it to be spherical in shape is called:

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Covalent radii.

Atomic radii.

Ionic radii.

Both (a) and (C).

During the process of crystallization, the hot saturated solution:

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is cooled very slowly to get large size crystals

is cooled at a moderate rate to get medium sized crystals of the product

is evaporated to get the crystals of the products

is mixed with an immiscible liquid to get the pure crystals of the product.

Kolb's method of alkanes production, is actually

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Hydrolysis

Catalysis

Electrolysis

Hydrogenation

Estimation of Na in sea water is an example of

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Numerical analysis

Qualitative analysis

Quantitative analysis

None of above

Soil remediation means

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To make it suitable for cultivation of crops

To make it acidic

To make it alkeline

To add manure into it

Atmosphere thickness is (in km) around the earth:

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10 km

100 km

1000 km

1500 km

The functional group isomer of dimethylether is

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Ethyl alcohol

Propyl alcohol

Diethyl ether

Butyl alcohol

Internal energy of a system is equal to

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Kinetic energy of particles

Potential energy due to binding forces between particles

Sum of kinetic energy plus potential energy of the particles

Heat contents

Pb has inert pair of electrons:

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One

Two

Three

Four

The conductivity of strong electrolyte

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Increases on dilution slightly

Does not change on dilution

Decreases on dilution

Depends on density of electrolyte it self

If the ionic product of a solution is less than the solubility product, the solution is

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Supersaturated

Unsaturated

Ideal

Saturated

Those compound which have any atom other than C as member of rings are called as

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Monocyclic

Hetrocyclic

Aliphatic

Both a and b

The disaccharide present in milk is

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Sucrose

Maltose

Lactose

Cellobiose

Heat,. work and internal energy of the system and surroundings are related into an equation which is called

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First law of thermodynamics

Hess's law

Henry's law

Born-haber cycle

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Elimination Esterification

Elimination Isomerisation

Oxidation Exterification

Oxidation Oxidation

The word paper is derived from the name of which reedy plany

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Rose

Sun flower

Papyrus

Water hyacinth

Which class of compound is more reactive

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Alkane

Alkene

Alkyne

None

The empirical formula of a compound is CH₂O. What may be the compound

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C₂H₅OH

C₆H₅OH

HCOOH

Which following derivative cannot be prepared directly from acetic acid?

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Acetamide

Acetyl chloride

Acetic anhdride

Ethyl acetate

Among the elements given below, the one with highest electropositivity is

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Cu

Cs

Cr

Ba

Ammonia like water also reacts with Grignard's reagent to give

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Alkane

Alkene

Alkyne

Amide

Spraying of DDT produces pollution of

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Air

Air and water

Air and soil

Air, water and soil

For a chemical reaction to take place the particles must have sufficient energy for the effective collisions, the energy is called

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Average energy

Activation energy

Potential energy

Collision energy

The horizontal rows in the periodic table are called periods. The number of period are

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5

6

7

8

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

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2 cm³

2.5 cm³

5 cm³

10 cm³

Which statement is not correct

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Enzymes catalyst a specific reaction

Enzymes show catalytic activity at a specific temperature

The catalytic activity of enzymes is stopped if optimum pH is changed

The catalytic activity is poisoned by a co-enzymes

Which one does not declourized KMnO₄

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Alkenes

Alkynes

Bezene

All above

The correct relation b/wK_{c and}K_{p is :}

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K_p = K_c[P/N] ^Δn

K_{c =}K_p(RT) ^Δn

K_{p =}K_c(RT) ^Δn

One of the following bonds is polar but compound is non-polar

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H₂O

NH₃

HCl

CO₂

What mass of NaOH is required to prepare 2.5 dm³of 1.5 M NaOH solution

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130 g

140 g

150 g

160 g

IIB elements (Zn, Cd, Hg) and III B elements (Sc, Y and La) are

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Non typical transition element

Typical transition element

Normal elements

Inner transition element