KEAM 2027 Sample Paper (Paper 1 - Physics & Chemistry)

SAMPLE PAPER

S A M P L E Q U E S T I O N P A P E R

KEAM 2027 (Paper 1 - Physics &
Chemistry)
Modelled on the actual exam pattern
.

QUESTIONS MAX MARKS TIME MARKING

120 480 150 Min +4 / −1

GENERAL INSTRUCTIONS

1. This paper contains 120 multiple-choice questions. All questions are compulsory.

2. Each question has four options — (A), (B), (C) and (D) — of which only one is correct.

3. Each correct answer carries 4 marks; 1 mark is deducted for each wrong answer.

4. Total time allowed is 150 minutes. Manage your time across all sections.

5. Use of calculators, mobile phones or any electronic device is not permitted.

6. Attempt the paper first, then check your answers against the Answer Key at the end.

Candidate Name: Roll No.: Date:

SAMPLE PAPER

KEAM 2027 (Paper 1 - Physics & Chemistry)
SAMPLE QUESTION PAPER

Questions 120 Max Marks 480 Time 150 Min Marking +4 / −1

Attempt all questions. Choose the one correct option for each.

PHYSICS

1. 2.

The relative viscosity of blood remains constant between In a gas at STP, if n is the number density of the
molecules and r is the radius of the molecule, then the
(A) mean free path of the molecule is inversely proportional
to
0°C and 37°C

(A)
(B)

nr2
30°C and 59°C

(B)
(C)

nr
10°C and 47°C

(C)
(D)

n2r
0°C and 57°C

(D)

n

3. 4.

The electrostatic force between a proton and an electron Radio waves are
for certain distance of separation is F; and that between
an electron and positron at the same distance of (A)

separation is F2. Then the ratio F1 : F2 is
produced by hot bodies

(A)
(B)

1:1
suitable for radar systems

(B)
(C)

1:2
used in cellular phones to transmit voice communication

(C)
(D)

1:3
used to kill germs in water purifiers

(D)

2:1

5. 6.

Weight of a body of mass m in its free fall above the In projectile motion, the physical quantity that remains
surface of the earth is invariant throughout is

(A) (A)

mg vertical component of velocity

(B) (B)

infinity horizontal component of velocity

(C) (C)

1 kinetic energy of the projectile

(D) (D)

0 potential energy of the projectile

7. 8.

Work-energy theorem is an integral form of The final result of the sum of the numbers 523.32,
1.21524 and 107.3 rounded to correct significant figures
(A) is

Newton’s first law
(A)

(B) 631.8

Law of equipartition of energy
(B)

(C) 631.835

Newton’s second law
(C)

(D) 631.83

Newton’s law of gravitation
(D)

631.8352

9. 10.

A cyclist starting from rest moves with uniform Which one of the following is not a contact force?
acceleration and covers 120 m in 10s. Then his
acceleration in ms-2 is (A)

frictional force
(A)

5 (B)

air resistance
(B)

1.5 (C)

viscous force
(C)

2.4 (D)

gravitational force
(D)

4.8

11. 12.

An electron and a proton moving with same velocity v An ideal Carnot engine working with source temperature
enter into a uniform perpendicular magnetic field. Then
T , and sink temperature T , has efficiency . Then
1 2

(A)
the value of the ratio is
electron alone moves in straight line path

(B) (A)

both move in straight line paths

(C)

both move in elliptical paths (B)

(D)

both move in circular paths

(C)

(D)

13. 14.

The INCORRECT statement is The time period of a simple pendulum of length L is 3s. If
the length of the pendulum is increased 4 times, the
(A) increase in time period of the simple pendulum is

The separation between two successive nodes is
(A)

(B) 3s

Antinodes are formed at both ends of an open organ pipe
(B)

(C) 4s

In a one end closed organ pipe node is formed at the closed
(C)
end
5s
(D)
(D)
Nodes are formed at both ends of stretched string
6s

15. 16.

The strength of earth’s magnetic field at a point is 0.4x10 A poly atomic molecule has 3 translational, 3 rotational
-5 T. If this field is to be annulled by the magnetic degrees of freedom and 2 vibrational modes. The ratio of
induction produced at the centre of a circular conducting

loop of radius, , the current to be sent through the
specific heats is
loop is

(A) (A)

2A 7/5

(B) (B)

0.15 A 3/5

(C) (C)

1.5 A 5/3

(D) (D)

0.2 A 6/5

17. 18.

Material that is widely used to make wire bound standard
The angle made by with the x axis is resistors is

(A) (A)

30° manganin

(B) (B)

180° iron

(C) (C)

90° copper

(D) (D)

45° germanium

19. 20.

The INCORRECT statement is Ina tug of war, two opposite teams pull the rope with an
equal and opposite force of 20 KN at each end of the
(A) rope. If the equilibrium condition exists in the rope, the
tension in it is
Optical density is the ratio of speed of light in two media.

(A)
(B)

10 kN
Hotter air is less dense than the cooler air.

(B)
(C)

20 kN
Cooler air has higher refractive index than the hotter air.

(C)
(D)

40 kN
The refractive index of air decreases with its density

(D)

15 kN

21. 22.

A solid metal cylinder A and a hollow metal cylinder B Two bodies of masses m and 4m have kinetic energies in
have same radii are in the ratio 2: 1. Then the ratio of the ratio 1: 2. Their momenta p and p are in the ratio
1 2
their respective mom about their own axis is
(A)
(A)

1:1

(B)
(B)

2:1

(C) (C)

4:1

(D)
(D)
1:4

23. 24.

Two satellites A and B are orbiting a planet in circular The separation between the successive node and
orbits with radii 2R and R respectively. If the’ speed of antinode is A /4 36. The ratio of the magnitudes of
satellite A is 2 v, then the speed of satellite B is maximum acceleration to the corresponding velocity of a
body undergoing simple harmonic motion,
(A)
is

(A)

(B)

(B)

0
(C)

(C)

1

(D) (D)

6v infinity

25. 26.

The power of a corrective lens is —4.0 D. The lens is The working of hydraulic lift is based on the principle of

(A) (A)

convex lens of focal length + 25 cm Bernoulli

(B) (B)

concave lens of focal length — 25 cm Toricelli’s law

(C) (C)

convex lens of focal length + 4.cm Pascal’s law

(D) (D)

concave lens of focal length 4m Magnus effect

27. 28.

A plane wave front is incident on a thin prism, thin Gravitational potential energy associated with two point
convex lens and a concave mirror separately. The wave masses, each of 1 kg, separated by a distance of 1 cm in
front(s) emerging out from the Joule is (G = gravitational constant)

(A) (A)

thin prism is spherical 2G

(B) (B)

convex lens and concave mirror are plane 100G

(C) (C)

convex lens and prism are plane 1000G

(D) (D)

convex lens and concave mirror are spherical 500G

29. 30.

Conservation of charge and conservation of energy are The three colours in a carbon resistor are red, black and
respectively the basis of orange. If the fourth colour is absent, then the value of
tolerance of the resistor is
(A)
(A)
Joule’s law and Ampere’s circuital law

(B)

Gauss’ law and Ohm’s law (B)

(C)

Kirchhoff’s junction rule and loop rule
(C)
(D)

Coulomb’s inverse square law and Gauss’ law

(D)

31. 32.

The r.m.s. speed of molecules of an ideal gas at 27°C is Given below are the velocity-time graphs of five particles,
200 ms-1 . When the temperature is increased to 327°C, A, B, C, D and E. The correct graph from the following v-t
the r.m.s. speed of the molecules is changed to plots in which the velocity of the particle is a function of t
2 is

(A)
(A)
490.2 ms-1

(B)

315.2 ms-1

(C)

282.8 ms-1
(B)

(D)

425.5 ms-1

(C)

(D)

33. 34.

The ratio of energy stored per unit volume in a solenoid Similar or same magnetic fields can be produced by
having magnetic induction B to the electrostatic energy
stored per unit volume in a capacitor in electric field E is (A)

a solenoid and a bar magnet
(A)

(B)

a solenoid and a toroid

(C)
(B)
a solenoid and a circular coil

(D)

a circular coil and a toroid
(C)

(D)

35. 36.

No process is possible whose sole result is the transfer of The electromagnetic waves that cause greenhouse effect
heat from a colder object to a hotter object. This is are
Claudius statement for
(A)
(A)
Cathode rays
Zeroth law of thermodynamics
(B)
(B)
UV rays
First law of thermodynamics
(C)
(C)
Gamma rays
Second law of thermodynamics
(D)
(D)
Infrared rays
Principle of refrigeration

37. 38.

Which one of the following statement is correct? The charge present in a doubly ionized helium atom is

(A) (A)

In inelastic collisions, both momentum and Kinetic energy 1.6x10-19 C.G
are conserved
(B)
(B)
6.4x 10-19 C
In inelastic collisions, momentum is conserved and kinetic
energy is not conserved (C)

4:8x 10-19 C
(C)

In elastic collisions, momentum is conserved and kinetic (D)

energy 1s not conserved
3.2x10-19 C

(D)

In inelastic collisions, momentum is not conserved and
kinetic energy is conserved

39. 40.

The INCORRECT statement is
When an A.C. voltage of is applied

to a capacitor, it produces a current of (A)

The capacitive reactance of the The direction of eddy currents is given by Lenz’ law.
capacitor is
(B)
(A)
A choke coil is a pure inductor used for controlling current in
120 ohm an A.C. circuit.

(B) (C)

180ohm
The r.m.s. value of A.C. current is times the peak value
of A.C. current.
(C)

200 ohm (D)

Quality factor is a measure of sharpness of resonance in A.C
(D)
circuit.
220 ohm

41. 42.

Find the mismatch pair : Two persons stand at the edges of a rotating, circular
platform at diametrically opposite points. If they start
(A) moving towards each other at uniform velocity, then its

Induction furnace : eddy current
(A)

(B) angular velocity decreases

A.C. generator : armature coil
(B)

(C) moment of inertia increases.

LCR circuit : resonance
(C)

(D) moment of inertia remains constant

Transformer : D.C. voltage
(D)

angular velocity increases and moment of inertia decreases

43. 44.

The dimensional formula for the power of a lens is The INCORRECT statement is

(A) (A)

A gas is compressible and occupy all the space available to
it

(B) (B)

Pressure in a fluid at rest is same at all points which are at
the same height

(C) (C)

The surface of water in a capillary is concave

(D)
(D)
Surface tension is a force per unit area

45. 46.

Three identical silver cups A, B and C contain three The minimum speed at which an object of 1 kg mass is
liquids of same densities at same temperature higher thrown from the surface of the moon so that it does not
than the temperature of the surrounding. If the ratio of fall back to the moon is
their specific heat capacities is 1:2 : 4, then
(A)
(A)
2.3 km/hr
B cools faster than C but slower than A
(B)
(B)
3.2 km/hr
A cools faster than B and C
(C)
(C)
11.2km/hr
C cools faster than B and A
(D)
(D)
2.3 km/s
B cools faster than A and C

47. 48.

A tuning fork, produces;4 beats per second with both Two ray’ of light A and B are falling on a glass slab at the
26.0 cm and 25.2 cm of stretched sonometer wire. angles of incidence 45° and 60°. If the reflected ray of A
Frequency of the fork is is partially polarized and that of B is complete polarized,
then the refractive index of glass is
(A)
(A)
285 Hz
1.33
(B)
(B)
512 Hz
1.5
(C)
(C)
256 Hz
1.65
(D)
(D)
484 Hz
1.732

49. 50.

The angular momentum of a particle with respect to the The technology related with the Bernoulli’s principle is
origin will not used in

(A) (A)

the directional line of linear momentum passes through the hydroelectric power (
origin
(B)
(B)
rocket propulsion
the particle is at the origin
(C)
(C)
aeroplane
the angle between the position vector and linear
momentum is 180° (D)

steam engine
(D)

the angle between the position vector and linear
momentum is 90°

51. 52.

A process in which the amount of heat supplied to the If the Young’s modulus of the material of a wire is
system goes fully to change its internal energy and numerically equal to ten times the stress applied to a
temperature is wire of length l, then the change in the length of the wire
is
(A)
(A)
cyclic process
0.1l
(B)
(B)
isobaric process
0.5l
(C)
(C)
isothermal process
0.2l
(D)
(D)
isochoric process
0.7l

53. 54.

A man weighing 70 kg is riding on a cart of mass 30 kg
Around a stationary charge of , another charge
which moves along a level floor at a speed of 3 ms-1 . If

is taken once round a circle of radius 4 cm. Thé he runs on the cart so that his velocity/relative to the
cart is 4 ms-1 in the direction opposite to the motion of
amount of work done in Joule is
the cart, the speed of centre of mass of the system is

(A)
(A)
1
0.3 ms-1

(B)
(B)
2
0.5 ms-1

(C)
(C)
0
0.2 ms-1

(D)
(D)
3
0.1 ms-1

55. 56.

The effective capacitance between A and B in the given The INCORRECT statement is
figure is
(A)

Resistivity of germanium decreases with the increase of
temperature

(B)

Resistivity of semiconductors is higher than that of the
conductors

(A) (C)

Resistivity of nichrome shows a weak dependence with
temperature

(B) (D)

Resistivity of insulators is independent of temperature

(C)

(D)

0

57. 58.

Ina moving coil galvanometer, when the number of turns A toy car of mass 80 g is maintained to move in a
of the coil is doubled, horizontal circle of radius 0.8 m with a velocity v ms-1. If
the centripetal force acting on it is 10 N, then the value
(A) of vin ms-1 is

the current sensitivity is halved but Voltage sensitivity
(A)
remains unchanged
1
(B)
(B)
the current sensitivity remains unchanged but voltage
sensitivity is doubled 5

(C) (C)

the current sensitivity is doubled but,voltage sensitivity 100
remains unchanged
(D)
(D)
10
both the current sensitivity and voltage sensitivity remain
unchanged

59. 60.

If the Young’s double slit experimental set up is The force experienced by a proton moving in an electric
field of intensity 3E is (e is the charge of the electron)
immersed in a liquid of refractive index , the fringe

(A)
width of the interference pattern observed is When

the experiment is performed in air medium with the same Ee

experimental set up, the fringe width of the pattern will
(B)
be

2 Ee
(A)
(C)

3 Ee

(B)
(D)

Ee /2

(C)

(D)

CHEMISTRY

61. 62.

A dinegative ion of the element X consists of 10 electrons The primary precursor of photochemical smog that can be
and 8 neutrons. A dipositive ion of the element Y consists metabolised by plants such as Juniparus and Pyrus, is
of 12 protons. The number of neutrons in Y is 1.5 times
the number of electrons in atom X. Then the mass (A)

numbers of X and Y would be in the ratio
ozone

(A)
(B)

12
nitrogen dioxide

(B)
(C)

2:3
carbon dioxide

(C)
(D)

3:2
sulphur dioxide

(D)

2:5

63. 64.

A metal ‘X’ crystallizes in a body centred cubic structure Choose the correct order of acidity of the following
and its metallic radius is 346.4 pm. The length (in pm) of phenols:
the unit cell is
(I) m-nitrophenol (II) p-cresol (III) p-nitrophenol (IV)
phenol
(A)

200 (A)

(B) (III) > (I) > (IV) > (II)

800 (B)

(C) (II) > (IV) > (III) > (I)

600 (C)

(D) (II) > (I) > (IV) > (III)

500 (D)

(IV) > (III) > (II) > (I)

65. 66.

The material that is not photo sensitive to visible light is When light falls on a solar cell, the generation of emf
happens due to
(A)
(A)
caesium
generation of electron-hole pairs only
(B)
(B)
sodium
generation and collection of electron-hole pairs only
(C)
(C)
rubidium
collection of electron-hole pairs only
(D)
(D)
cadmium
generation, separation and collection of electron-hole pairs

67. 68.

Which of the following set of transition metals have high Which one of the following is a non-narcotic analgesics?
volatility?
(A)
(A)
Morphine
Ti, Zn and Hf
(B)
(B)
Codeine
Cr, Mo and W
(C)
(C)
Paracetamol
Mn, Tc and Re
(D)
(D)
Heroin
Zn, Cd and Hg

69. 70.

Toluene on treatment with chromic oxide in acetic an The standard enthalpy of formation of
hydridé at 273K to 283K gives
-393

(A) kJ mol-1 and —286 kJ mol-1 respectively. The amount of
heat liberated (in kJ) when 3.2g of methane gas is burnt
benzaldyde under standard conditions is

(B) (A)

benzylidene diacetate 89

(C) (B)

benzoic acid 278

(D) (C)

phenylacetate 890

(D)

178

71. 72.

he elemental analysis of an organic compound gave The special purpose diode operated / working under
C:38.71%, H: 9.67%. What is the empirical formula of the forward bias is / are
compound?
(A)
(A)
zener diode and LED
CH 0
2
(B)
(B)
photo diode and LED
CH 0
3
(C)
(C)
zener diode and solar cell
CH O
4
(D)
(D)
LED
CHO

73. 74.

In Bohr atom model, the total energy of the electron in The complexes [Co(NH ) NO ]Cl and [Co(NH ) ONOCl
3 5 2 2 3 5 2
hydrogen atom is —3.4eV. Then its angular momentum are
about the nucleus of the atom is (A = Planck’s constant)
(A)
(A)
coordination isomers

(B)

geometrical isomers
(B)

(C)

ionization isomers

(D)
(C)

linkage isomers

(D)

75. 76.

Which one of the following molecules contains only Which of the following is added to commercial salt to
primary and tertiary carbon atoms? control hypothyroidism?

(A) (A)

2, 2-Dimethylbutane Magnesium iodide

(B) (B)

3-Methylpentane Potassium iodide

(C) (C)

2, 3-Dimethylbutane Sodium iodide

(D) (D)

n-Hexane Calcium iodide

77. 78.

he critical temperature of some gases are: Methane A particle of mass 6.6x10-31kg is moving with a velocity
190K, ammonia 405K, carbon dioxide 304K, n-butane of 1x107ms-1. The de Broglie wavelength (in A )
425K and dihydrogen 33K. The gas that is adsorbed to associated with the particle, is (h=6.6 x10-34 Js)
the maximum extent on Ig of activated charcoal at a
given temperature is (A)

1
(A)

dihydrogen (B)

10
(B)

methane (C)

5
(C)

carbon dioxide (D)

2
(D)

n-butane

79. 80.

The energy equivalent of 5 g of a substance is The product formed, when benzene diazonium
fluoroborate is heated with aqueous sodium nitrite
(A) solution in the presence of copper is

4.5x1012 J
(A)

(B) fluorobenzene

9x1012 J
(B)

(C) benzene

4.5 x 1014 J
(C)

(D) phenol

4.5x1016 J
(D)

nitrobenzene

81.

Match the following:

a) Saline hydride (i) CrH

b) Electron-deficient hydride (ii) CH
4

c) Electron-precise hydride (iii), BeH
2

d) Electron-rich hydride (iv) B H
2 6

e) Metallic hydride (v) H 0
2

Choose the correct option :

(A)

a)-(iii); b)-(ii); c)-(iv); d)-(v); e)-(i)

(B)

a)-(iii); b)-(v); c)-(iv); d)-(ii); e)-(i)

(C)

a)-(iv); b)-(ii); c)-(iii);,d)-(v); e)-(i)

(D)

a)-(iii); b)-(iv).c)-(ii); d)-(v); e)-(i)

82. 83.

A fast moving particle of mass 6.63*10-28 g can be Which one of the following is the correct relation
located with an accuracy of 1A. The uncertainty in its between Cp and Cv for one mole of an ideal gas?,(R is
velocity (in ms-1) is about (h=6.63x10-34 Js) molar gas constant)

(A) (A)

8x103 Cp= Cv - R

(B) (B)

8x104 Cp=Cv+R

(C) (C)

8x 105 Cp=R-Cv

(D) (D)

8x106 Cp = Cv xR

84. 85.

. The INCORRECT statement is Match the following :

(A)

Nuclear density is independent of the mass number A of the
nucleus.

(B) Choose the correct option:

Average binding energy per nucleon is very high for light
(A)
nuclei.
a)-(iii); b)-(i); c)-(v); d)-(ii); e)-(iv)
(C)
(B)
Nuclear forces are strongest in nature.
a)-(iii); b)-(v); c)-(i); d)-(ii); e)-(iv)
(D)
(C)
In a radioactive nucleus, the half life period is directly
proportional to mean life. a)-(i); b)-(ii); c)-(iii); d)-(iv); e)-(v)

(D)

a)-(iii); b)-(v); c)-(i); d)-(iv); e)-(ii)

86. 87.

Which one of the following is not true with regard to From the following, choose the correct structures of
physisorption? chloroxylenol and terpineol, which are the constituents of
“Dettol”
(A)

It arises because of van der Waals’ forces

(B)

It is not specific in nature

(C)

High activation energy is needed
(A)
(D)
a and b
It depends on the nature of gas
(B)

b and c

(C)

a and d

(D)

a and c

88. 89.

Both Cr2+ and Mn3+ have d4 configuration. Which one of If the potential at A is greater than the potential at.B,
the following is true? then the equivalent resistance of the circuit across AB is

(A)

Mn3+ is a reducing agent but Cr2+ is an oxidising agent

(B)

Mn3+ is an oxidising agent but Cr2+ is a reducing agent
(A)
(C)

Both Mn3+ and Cr2+ are oxidising agents

(D) (B)

Both Mn2*and Cr** are reducing agents

(C)

(D)

90. 91.

The metal which dissolves in liquid ammonia to give a Ina reaction 3A — Products, the concentration of A
blue-black solution due to formation of solvated electron decreases from 0.4 mol -1 to 0.1 mol L-1 in 20 minutes at
is 300K. The rate of decrease in [A] during this interval (in
mol L min-1) at 300K is
-1
(A)
(A)
aluminum
0.005
(B)
(B)
gallium
0.015
(C)
(C)
calcium
0.001
(D)
(D)
germanium
0.15

92. 93.

Among the following pairs of compounds, the one that The minimum length of the dipole antenna for a carrier
does not illustrate the law of multiple proportions, is wave frequency of 200 MHz is nearly

(A) (A)

NO and NO 1.75 m
2

(B) (B)

CuO and Cu O 0.52 m
2

(C) (C)

FeO and Fe 0 0.38 m
2 3

(D) (D)

H 0 and H S 0.75 m
2 2

94. 95.

Which of the following compounds is used as The momenta of a proton, a neutron and an electron are
refrigerant? in the ratio 3:2:1, then their respective de Broglie
wavelengths are in the ratio
(A)
(A)
CCl F
2 2
1:1:1
(B)
(B)
CICH CH SCH CH Cl
2 2 2 2
2 : 3: 6
(C)
(C)
CCl
4
1 : 2: 3
(D)
(D)
CCI NO
3 2
4 : 2: 1

96. 97.

Which one of the following molecules contains an Which one of the following processes does not produce
incomplete octet of the central atom? dinitrogen?

(A) (A)

SF Thermal decomposition of barium azide
6

(B) (B)

AlCl Treating an aqueous solution of ammonium chloride with
3
sodium nitrite
(C)
(C)
CH
4
Thermal decomposition of sodium azide
(D)
(D)
PF
5
Thermal decomposition of ammonium nitrate

98. 99.

Which one of the following is not an ore of iron? he overall complex dissociation equilibrium constant for
[Cr(H 0) ]3+ ion is 5x10-12. The overall stability constant
2 6
(A) of the complex is

Magnesite
(A)

(B) 2x10-11

Haematite
(B)

(C) 5x1011

Magnetite
(C)

(D) 5x1010

Iron pyrites
(D)

2x1011

100. 101.

The chemistry teacher asked the students to prepare Logic gates are given the inputs A = 0 and B = 1 in case
20% w/w solution of urea [NH CONH ] in water. Which (a) and A= 1 and B=0 in case (b). The gates giving output
2 2
one of the following solution does not conform to the of y = 1 for both the cases are
required composition?
(A)
(A)
OR and AND
20g urea dissolved in 80g water
(B)
(B)
OR and NAND
10g urea dissolved in 40g water
(C)
(C)
AND and NOR
4g urea dissolved in 16g water
(D)
(D)
NOR and NAND
15g urea dissolved in 30g water

102. 103.

Ina nuclear reactor, the ratio of number of fission In communication systems, the device used to convert
produced by a given generation of neutrons to the energy from one form to another form is
number of fission of the preceding generation is known
as (A)

repeater
(A)

quality factor (B)

transducer
(B)

nuclear reaction factor (C)

amplifier
(C)

multiplication factor (D)

attenuator
(D)

fission ratio

104. 105.

Resorcinol is Conveyor belt is manufactured from

(A) (A)

Benzene-1, 3-diol buna-S

(B) (B)

Benzene-1, 2-diol neoprene

(C) (C)

4-Methylphenol PVC

(D) (D)

Benzene-1, 4-diol glyptal

106. 107.

Which one of the following represents valeraldehyde? Some of the reactions and their equilibrium constants Kc
are given. Choose the reaction which proceeds rarely at
(A) the given temperature

CH CH CH CH CHO
3 2 2 2 (A)

(B)

CH CH(CH )CH CHO
3 3 2
(B)
(C)

CH CH(OCH )CHO
3 3

(D) (C)

(CH ) CHCHO
3 2

(D)

108. 109.

Which one of the following is a polysaccharide? The equilibrium constants for the following two reactions
at 298K are given below:
(A)

Glycogen

(B)
What is the value of K for the reaction,
Lactose

(C)

Maltose

(D) (A)

Sucrose 1/5

(B)

1/40

(C)

3/4

(D)

20

110. 111.

The standard electrode potentials of some electrodes are The average oxidation number of bromine in Br O is
3 8
given below:
(A)

16/3

Predict the reaction that is not feasible: (B)

(A) 4/3

Ag+(aq) oxidises Cu(s) (C)

(B) 3/4

Ag(s) reduces Fe3+(aq) (D)

(C) 5/2

Bra(aq) oxidises Fe2+(aq)

(D)

Zn(s) reduces Cu2+(aq)

112. 113.

Among methanamine, ethanamine,. benzenamine, N- Which of the following aryl chlorides on warming with
methylaniline and N, N-dimethylaniline, the weakest and water forms the corresponding phenol?
the strongest base in aqueous phase, respectively are
(A)
(A)
4-Methylchlorobenzene
benzenamine and methanamine
(B)
(B)
4-Nitrochlorobenzene
N-methylaniline and ethanamine
(C)
(C)
2, 4, 6-Trinitrochlorobenzene
N, N-dimethylaniline and ethanamine
(D)
(D)
2-Nitrochlorobenzene
benzenamine‘and ethanamine

114. 115.

Calculate the number of bonds in 2-n- The vapour pressures of pure liquids X and Y at 350K are
propylpent-1-ene. 200 mm and 300 mm of Hg respectively. Then the correct
vapour pressure (in mm of Hg) of an ideal solution
(A) containing X and Y in the mole ratio 3 : 2 at the same
temperature is

(A)
(B)
120

(B)

(C) 180

(C)

260
(D)

(D)

240

116. 117.

Which one of the following molecules gives four isomeric Which one of the following contains the highest number
monochlorides on photochemical chlorination? of oxygen atoms?

(A) (A)

2-Methylpropane One mole of aluminum sulphate

(B) (B)

n-Butane Two moles of ferrous sulphate

(C) (C)

2-Methylbutane Three moles of hydrogen peroxide

(D) (D)

2, 3-Dimethylbutane Two moles of potassium permanganate

118. 119.

Which one of the following reactions involves change The dipole-dipole interaction energy between rotating
from sp2 to sp3 hybridisation of the central atom? polar molecules is proportional to __, where ‘r’ is the
distance between polar molecules.
(A)
(A)

(B)

(B)

(C)

(C)

(D)

(D)

120.

The half-life period of a first order reaction at 298K is 20
minutes. The time (in min.) required for 99.9%
completion of the reaction at the same temperature, is

(A)

100

(B)

200

(C)

150

(D)

250

ANSWER KEY

1. (A) 2. (A) 3. (A) 4. (D) 5. (D) 6. (B) 7. (C)

8. (A) 9. (C) 10. (D) 11. (D) 12. (A) 13. (A) 14. (D)

15. (D) 16. (D) 17. (D) 18. (A) 19. (D) 20. (B) 21. (B)

22. (A) 23. (B) 24. (D) 25. (B) 26. (C) 27. (D) 28. (B)

29. (C) 30. (D) 31. (C) 32. (A) 33. (B) 34. (A) 35. (C)

36. (D) 37. (B) 38. (D) 39. (D) 40. (C) 41. (D) 42. (D)

43. (A) 44. (D) 45. (C) 46. (D) 47. (C) 48. (D) 49. (D)

50. (C) 51. (D) 52. (A) 53. (C) 54. (C) 55. (B) 56. (D)

57. (C) 58. (D) 59. (C) 60. (D) 61. (B) 62. (C) 63. (B)

64. (A) 65. (D) 66. (D) 67. (D) 68. (C) 69. (B) 70. (D)

71. (B) 72. (D) 73. (A) 74. (D) 75. (C) 76. (C) 77. (D)

78. (A) 79. (C) 80. (D) 81. (D) 82. (C) 83. (B) 84. (B)

85. (B) 86. (C) 87. (D) 88. (B) 89. (D) 90. (C) 91. (B)

92. (D) 93. (D) 94. (A) 95. (B) 96. (B) 97. (D) 98. (A)

99. (D) 100. (D) 101. (B) 102. (C) 103. (B) 104. (A) 105. (B)

106. (A) 107. (D) 108. (A) 109. (D) 110. (B) 111. (A) 112. (D)

113. (C) 114. (B) 115. (D) 116. (C) 117. (A) 118. (C) 119. (D)

120. (B)