Custom Practice Test - 01-Feb

Contact Number: 9667591930 / 8527521718

5. When a soft-iron core is inserted into a solenoid, the

Physics magnetic field is observed to increase by 1500 times
1. When the ambient temperature increases, the current near its opening. The turns density is 1000 m-1 and the
through a forward-biased diode: solenoid carries a current 100 mA. The field at its centre
1. increases is (nearly):
2. decreases 1. 0.2 T
3. remains unchanged 2. 0.02 T
3. 0.4 T
4. increases briefly but returns to the same value 4. 0.04 T

6. In a potentiometer circuit, a cell of emf 1.5 V gives a

2. In a certain physics experiment, two carts run along a balance point at 36 cm length of wire. If another cell of
frictionless, level, one-dimensional track. The mass of emf 2.5 V replaces the first cell, then at what length of
cart A is 1 kg and the mass of the cart B is 2 kg. Initially the wire, the balance point occur?
cart A is moving to the right at 0.2 m/s, and cart B is 1. 64 cm
moving to the left at 0.7 m/s (see figure). After they 2. 62 cm
collide, they stick together. 3. 60 cm
4. 21.6 cm

7. The kinetic energy of the fastest photoelectron emitted

What is the magnitude of the total momentum of the using light of wavelength λ is E, while the K.E. of the
system before the collision? fastest photoelectron using light of wavelength λ is 2E. ′

1. 1.2 kg-m/s If the photocathode is the same in both cases, then:

2. 1.5 kg-m/s
1. λ 1
=
3. 1.6 kg-m/s λ
′ 2

4. 2.7 kg-m/s 2. 1 > >

λ

′
1

2
λ

3. λ
<
1

3. If the nuclear radius of 27

Al is 3.6 Fermi, the λ
′ 2

approximate nuclear radius of 64

Cu in Fermi is:
4. λ

′
> 1
λ

1. 2.4
2. 1.2 8. An interference pattern is obtained with two coherent
3. 4.8 light sources of intensity ratio n. In the interference
4. 3.6 pattern, the ratio of their intensities (
Imax −Imin
) will be:
Imax +Imin

4. A block of mass m is placed on a smooth inclined 1.

√n
2.
2√n

wedge ABC of inclination θ as shown in the figure. The n + 1 n + 1

wedge is given an acceleration 'a' towards the right. The √n 2√ n

relation between a and θ for the block to remain 3. 2
4. 2
(n + 1) (n + 1)
stationary on the wedge is:

9. The elastic modulus for an elastic material compared

to a relatively inelastic material is:
1. less
2. equal
3. more
g
1. a = 4. can't say
cosec θ
g
2. a =
sin θ

3. a = g cos θ
4. a = g tan θ

Page: 1
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

10. Two particles of mass 5 kg and 10 kg respectively 16. A car starts from rest and accelerates at 5 m/s . At 2

are attached to the two ends of a rigid rod of length 1 m t = 4 s, a ball is dropped out of a window by a person
with negligible mass. The centre of mass of the system sitting in the car. What is the velocity and acceleration of
from the 5 kg particle is nearly at a distance of: the ball at t = 6 s?
1. 50 cm (Take g = 10 m/s ) 2

2. 67 cm
3. 80 cm 1. 20√2 m/s, 0 m/s 2

2. 20√2 m/s, 10 m/s

2
4. 33 cm
3. 20 m/s, 5 m/s 2

11. An electric dipole with dipole moment 4. 20 m/s, 0 m/s 2

→ = (3^i + 4^j) C-m, is kept in electric field

p

→ 17. y(x, t) = represents a moving wave

0.01
^
E = 0.4 kN/C i . What is the torque acting on it & the [(4x+2t) +5]
2

potential energy of the dipole? pulse, where x and y are in meter and t is in seconds.
1. 1600 (N × m) k, −1200 J
^ Then which of these statement(s) is incorrect?
2. −1600 (N × m) k ^
, 1200 J 1. pulse is moving in (−x) direction.
3. −1600 (N × m) k
^
, −1200 J 2. wave speed is 0.5 m/s.
3. maximum particle displacement is 1 cm.
4. 1600 (N × m) k
^
, 1200 J
4. it is a symmetric pulse.
12. Dispersion of light is caused due to:
1. intensity of light 2. density of the medium
18. The molar specific heat (at constant volume) of a
3. wavelength of light 4. amplitude of light 3
monoatomic ideal gas is Cv = R while that of a
2
5
13. Let us consider two solenoids A and B, made from diatomic ideal gas is Cv = R, where R is the
2
the same magnetic material of relative permeability μ r universal gas constant. The molar specific heat (at
and of equal area of cross-section. Length of A is twice constant pressure) of an equimolar mixture of the two
that of B and the number of turns per unit length in A is will be:
half that of B. The ratio of self-inductances of the two 1 3 5
1. ( R + R)
solenoids, L : L is:
A B 2 2 2

1. 1 : 2 2 2
−1

2. 2 : 1 2. ( + ) R

3. 8 : 1 3 5

4. 1 : 8 3. 3R
8
4. R
14. The time period of revolution of the electron in the 15

n
th
Bohr orbit is proportional to:
19. A wire of length L meters carrying a current of I
1. n 3/2
2. n
3

ampere is bent in the form of a circle. What is its

3. n −3
4. n
−1/3
magnetic moment?
2
IL
1. A-m
2

4
15. A step-up transformer is connected to an AC mains I × πL
2

supply of 220 V to operate at 11000 V, 88 W. The 2. A-m

2

4
current in the secondary circuit, ignoring the power loss 2
2I L
in the transformer, is: 3. A-m
2

1. 8 mA π
2

2. 4 mA 4.
IL
A-m
2

3. 0.4 A 4π

4. 4 A

Page: 2
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

20. Three particles move along the three sides of a 23. The capacitance between two close parallel metallic
triangle ABC, starting from the three vertices plates (plate area: A, separation: d; d being small),
simultaneously. Each covers one side of the triangle and where half of the space between them is filled by a
reaches the next vertex; all the particles reaching their dielectric of dielectric constant K, is (see figure):
destinations at the same time. Suppose that the particles
move at constant velocities: → , v→ , v→ (see figure).
v A B C

Then:

ε0 A ε0 A (K + 1)
1. (K + 1) 2.
d d 2

ε0 A 2 ε0 A 2K
3. 4.
d K + 1 d K + 1

1. v→ A
→
+ vB = vC → 24. An electromagnetic wave given by:
2. v→ A
→
− vB = vC → → ^ ^
E = E ( i + j) sin(ωt − kz)
0
→
vC
3. v→ A
→
− vB =
2
is travelling in space, where E→ is the electric field at
4. v→ →
+ v →
+ vC = 0 (x, y, z) at time t. The amplitude of the electric field is:
A B

1. E0 2. √2E0

21. An electromagnetic wave, given by its electric field E0

→
E, is travelling in space: 3. 2E0 4.
√2

→ ^
E = E j sin 2π(10 s
0 t −
x
)
3 −1

The magnetic field associated with the wave:

25. The speed of a distant star is observed to be 1 light-
(c=speed of light in vacuum= 3 × 10 m/s, nearly) 8

year/century. This value, when expressed in SI, is

1. has an amplitude
E0
and oscillates along y-axis (approximately):
c

E0
1. 3 × 10 m/s 8
2. 3 × 10 m/s 6

2. has an amplitude and oscillates along z-axis

c 3. 3 × 10 4
m/s 4. 300 m/s
3. has an amplitude E 0 ⋅ c and oscillates along y-axis
4. has an amplitude E 0 ⋅ c and oscillates along z-axis

26. In the circuit shown below, what will be the reading

of the voltmeter and the ammeter respectively?
22. An electron in an H-atom makes a transition from
the ground state into another state where its de-Broglie
wavelength is doubled. The energy required to make this
transition is:
1. 13.6 eV
2. 10.2 eV
3. 12.75 eV
4. 12.1 eV

1. 800 V, 2 A
2. 300 V, 2 A
3. 220 V, 2.2 A
4. 100 V, 2 A

Page: 3
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

27. When a particle with charge +q is thrown with an 30. The magnetic field at the centre of a semicircular arc
initial velocity v towards another stationary change +Q, of radius R, carrying current i is:
it is repelled back after reaching the nearest distance r μ i 0 μ i 0

from +Q. The closest distance that it can reach if it is 1. 2πR 2.

4πR
thrown with an initial velocity 2v, is: μ i 0 μ i 0
r r 3. 4.
1. 2. 4R 2R
4 2
r r
3. 4.
16 8
31. If the equation of a wave is represented by:
x
) m, where x is in meters
−4
y = 10 sin (100t −
10
28. A solid sphere (centre O) of homogeneous
transparent material kept upright has rays parallel to its and t in seconds, then the velocity of the wave will be:
vertical diameter falling on it. A ray that is aimed at P , 1. 100 m/s 2. 4 m/s
√3 3. 1000 m/s 4. 0 m/s
where the horizontal distance OP = R (R being the
2

sphere's radius), undergoes refraction at the sphere's

surface and strikes the lowest point A. 32. Atomic number increases in:
1. α-decay.
2. β -decay.
−

3. β -decay.
+

4. K-electron capture.

33. A point charge q is placed at the centre of the flat

surface of a semi-infinite cylinder of radius r. The flux
of its electric field through the curved surface of the
cylinder is:
Rays falling close to the highest point (B) of the sphere
are directed towards a point Q on the vertical diameter
AB, after refraction. The distance BQ is:

R R √3
1. 2.
2 √3 + 1

R √3 R √3
3. 4.
2 √3 − 1
q q
1. 2.
ε0 2ε0

29. Train A and train B are running on parallel tracks in 2q

opposite directions with speeds of 36 km/h and 3. 4. 0

ε0

72 km/h, respectively. A person is walking in train A in

the direction opposite to its motion with a speed of

1.8 km/hr. Speed (in m/s) of this person as observed

from train B will be close to:

(Take the distance between the tracks as negligible)
1. 30.5 ms −1

2. 29.5 ms −1

3. 31.5 ms −1

4. 28.5 ms −1

Page: 4
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

34. The following graph represents the T -V curves of an 38. An object of mass 100 kg falls from point A to B as
ideal gas (where T is the temperature and V the volume) shown in the figure. The change in its weight, corrected
at three pressures P , P and P compared with those of to the nearest integer (R is the radius of the Earth), is:
1 2 3 E

Charles's law represented as dotted lines.

Then the correct relation is :

1. P > P > P 2. P > P
1 3 2 2 1 > P3

3. P > P > P 4. P > P

1 2 3 3 2 > P1

1. 49 N
35. Which of the following gates, may be used to form
2. 89 N
all other gates?
3. 5 N
1. AND 2. OR 4. 10 N
3. NOT 4. NAND
39. All the resistances in circuit are 2 Ω each, E = 4 V
1

and E = 1 V. The potential difference between C and

2

36. A linear aperture whose width is 0.02 cm is placed D (i.e. V − V ) is:

C D

immediately in front of a lens of focal length 60 cm. The

aperture is illuminated normally by a parallel beam of
wavelength 5 × 10 cm. The distance of the first dark
−5

band of the diffraction pattern from the centre of the

screen is:
1. 0.10 cm
2. 0.25 cm
3. 0.20 cm
4. 0.15 cm

37. In a photoelectric cell, when photons of energy 6 eV 1. 1.5 V 2. −1.5 V

are incident on the cathode, the most energetic 3. 1.2 V 4. −1.2 V
photoelectron has energy of 2 eV. When photons of
energy 7 eV are incident on the cathode, no
photoelectric current would be observed when the 40. For a ferromagnetic material, the susceptibility is:
potential of the anode with respect to cathode is: 1. Large and negative 2. Large and positive
1. 7 V
3. Small and positive 4. Small and negative
2. 3 V
3. −2 V
4. −3 V

Page: 5
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

41. A rod XY of length l is placed in a uniform magnetic 44. The following figures show a liquid flowing ideally
field B, as shown in the diagram. The rod moves with a through a tapered tube. Single-tube manometers are
velocity v, making an angle of 60 with its length. The
∘
connected at three positions along the tube. Identify the
emf induced in the rod is: diagram showing the correct rise of liquid in the tubes.

1. 2.

vBl
1. vBl 2. 3. 4.
2

1
√3
3. vBl 4. vBl
2 √3

42. A pendulum-bob A, after being released as shown, 45. An object of mass m is suspended at the end of a
strikes a spring-block system when the bob A reaches its massless wire of length L and area of cross-section A.
lowest position; the mass of the bob A being equal to Young modulus of the material of the wire is Y . If the
that of the block (i.e., m) and the stiffness of the spring mass is pulled down slightly, its frequency of oscillation
being k. The collision between the block and the bob along the vertical direction is:
(A) is elastic. The time period of one complete
1. f =
1
√
mA

oscillation is: 2π YL

2. f =
1

2π
√
YL

mA

3. f =
1

2π
√
mL

YA

4. f =
1

2π
√
YA

mL

Chemistry
l m l m
46. A solution was prepared by adding 125 cm3 of
1. 2π√ + 2π√ 2. π√ + π√
isopropyl alcohol to water until the volume of the
g k g k
solution was 175 cm . The volume percent of isopropyl
3

3.
g
√
k
4. 1
g
1
√
k alcohol in the solution is:
√ + √ +
l m 2π l 2π m 1. 80.2 % 2. 71.4 %
3. 78.3 % 4. 84.5 %

43. A piece of ice falls from a height h so that it melts

completely. Only one-quarter of the heat produced is
absorbed by the ice. The value of h is:
[Latent heat of ice is 3.4 × 10 J/kg and g = 10 N/kg]
5

1. 544 km
2. 136 km
3. 68 km
4. 34 km

Page: 6
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

47. A galvanic cell is constructed from two half-cells of 51.

platinum and iron. The half-reactions for these two F rCr O + N a 2 4 2 CO3 + Air → (A) + F e2 O3 + CO2

elements are provided as follows: (A) + (B) → C

2+ − ∘
Pt (aq) + 2e → Pt(s) E = +1.20 V
C + KCl → D
3+ − ∘
Fe (aq) + 3e → Fe(s) E = −0.036 V
(Orange)
True statement, from the following, about this galvanic C and D are strong oxidizing agents. D is used as the
cell is: primary standard in volumetric analysis. On the basis of
1. E° = 1.164 V, and Pt2+ is the reducing agent. the above paragraph.
2. E° = 1.164 V, and Fe3+ is the reducing agent. The incorrect statement among the following is:
3. E° = 1.236 V, and Pt2+ is the oxidizing agent. 1. C is more soluble in water than D.
4. E° = 1.236 V, and Fe3+ is the oxidizing agent. D consists of two tetrahedral sharing one corner with
2.
a Cr-O-Cr bond angle of 126°.
48. The correct statement for a reversible process in a 3. Aqueous solution of A is yellow colored.
state of equilibrium is: 4. The oxidation state of Cr in D is +3.
1. ΔG = – 2.30RT log K
2. ΔG = 2.30RT log K
3. ΔGo = – 2.30RT log K 52. Identify the correct statements:
o
4. ΔG = 2.30RT log K KMnO4 acts as a self-indicator in a redox
Statement I:
titration.
49. What are the geometries of [N i(CO) ] and 4
ClO3- does not show a disproportionation
[N i(P P h ) Cl ] respectively?
Statement II:
3 2 2
reaction.
1. Both square planar.
In light of the above statements choose the correct
2. Tetrahedral and square planar, respectively.
answer from the options given below:
3. Both tetrahedral.
4. Square planar and tetrahedral, respectively. Statement I is correct, and Statement II is
1.
incorrect.
50. For the given redox reaction, Statement I is incorrect, and Statement II is
2.
aCr O2
2−
+ bSO
2−
(aq) + cH (aq) →
+ correct.
7 3

2aCr
3+
(aq) + bSO (aq) +
2−
H O(ℓ)
c 3. Statement I is correct, and Statement II is correct.
4 2

the coefficients a, b and c of a balanced equation are 4. Statement I is incorrect, and Statement II is
2

found to be, respectively: incorrect.

1. 8, 1, 3
2. 1, 3, 8
3. 3, 8, 1 53. The total vapour pressure of a mixture of 1 mole A
= 150 torr ) and 2 mole B (p = 240 torr ) is 200
∘ ∘
4. 1, 8, 3 (p
A B

mm.
Mark the correct statement that is associated with it:

1. There is a positive deviation from Raoult's law.

2. There is a negative deviation from Raoult's law.
3. There is no deviation from Raoult's law.
4. None of the above.

54. What is the ratio of the number of molecules of

oxygen to nitrogen in a specific gaseous mixture if their
mass ratio is 1:4?
1. 7:32 2. 1:8
3. 3:16 4. 1:4

Page: 7
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

55. For a first-order reaction, a half-life (t 1/2

) is 50 min. 60. Given:
The time t (in minutes) of the reaction is:
3+ − 2+ o
Co + e → Co ;E = +1.81 V
3/4

1. 75
4+ − 2+ o
Pb + 2e → Pb ;E = +1.67 V

2. 100 Ce
4+
+ e
−
→ Ce
3+
;E
o
= +1.61 V

3. 125 Bi
3+
+ 3e
−
→ Bi; E
0
= +0.20 V
4. 50 The oxidizing power of the species will increase in the
order:
56. Which is the correct statement among the following?
1. Starch is a polymer of α-glucose 1. 4+ 4+ 3+ 3+
Ce < Pb < Bi < Co
2. Amylose is a component of cellulose
2. Bi
3+
< Ce
4+
< Pb
4+
< Co
3+

3. Proteins are composed of only one type of amino acid

3. Co
3+
< Ce
4+
< Bi
3+
< Pb
4+

In the cyclic structure of fructose, there are four

4. 4. 3+ 4+ 4+ 3+
carbons and one oxygen atom Co < Pb < Ce < Bi

57. Correct statement regarding the dichromate ion 61. Choose the option containing all isoelectronic
(Cr2O72–) is: species:
1. N , O , F , N a 3− 2−

1. 4 Cr-O bond lengths are equal.

2. S , Cl , K , Ca −2 − + 2+

2. 6 Cr-O bond lengths are equal.

3. All Cr-O bond lengths are equal. 3. NH , CH , PF , Na 3 4 5
+

4. None of the Cr-O bond lengths are equal. 4. Ne, Na , F, N + 3−

58. The correct order of dipole moments for molecules 62. Which species among the following has the largest
N H , H S, CH and H F is :
3 2 4
ionic radius?
1. CH > H S > N H > H F 1. S 2−

4 2 3
2. Cl −

2. H S > N H > H F > CH

2 3 4
3. K +

3. N H > H F > CH > H S

3 4 2
4. Ca 2+

4. H F > N H > H S > CH 3 2 4

63.

59. Given the reaction:

2Cl( g) → Cl2 ( g)

What are the values of ΔH and ΔS, respectively? X and Y in the above-mentioned reaction are
1. ΔH = 0, Δ S = −ve respectively:
2. ΔH = 0, Δ S = 0 1. X = 2–Butyne; Y = 3–Hexyne
3. ΔH = −ve, Δ S = −ve 2. X = 2-Butyne; Y = 2-Hexyne
4. ΔH = +ve, Δ S = +ve 3. X = 1-Butyne; Y = 2-Hexyne
4. X = 1-Butyne; Y = 3–Hexyne

Page: 8
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

64. Consider the three statements given below: 69.

Bond length in N +
is 0.02 Ao greater than that in Gabriel's phthalimide reaction can be
I: 2 Assertion (A):
N2 . used to prepare aryl and alkyl amines.
Aryl halides have the same reactivity as
+ o Reason (R):
II: Bond length in NO is 0.09 A less than that in alkyl halides towards nucleophilic
NO. substitution reactions.
III: O has a shorter bond length than O2.
2−

Both (A) and (R) are True and (R) is the correct
1.
True statements among the sbove are: explanation of (A).
1. I and II Both (A) and (R) are True but (R) is not the correct
2. II and III 2.
explanation of (A).
3. I, II and III 3. (A) is True but (R) is False.
4. I and III
4. Both (A) and (R) are False.

65. A compound that can form a zwitterion is - 70. Match the reagents (List-I) with the products (List-
1. Aniline 2. Acetanilide II) obtained from phenol:
List-I List-II
3. Benzoic acid 4. Glycine
(i) NaOH
(A) (ii) CO2 (I) Benzoquinone
66. Accumulation of lactic acid (HC3H5O3 a monobasic (iii) H +

acid), in tissues leads to pain and fatigue. In a 0.10 M (i) Aqueous NaOH +
aqueous solution, lactic acid is 3.7% dissociated. The (B) CHCl3 (II) Benzene
value of the dissociation constant, Ka, for this acid, will +
(ii) H
be: (C) Zn dust, Δ (III) Salicylaldehyde
1. 1.4 × 10–5 (D) Na2Cr2O7, H2SO4 (IV) Salicylic acid
2. 1.4 × 10–4
Choose the correct answer from the options given
3. 3.7 × 10–4 below:
4. 2.8 × 10–4 (A) (B) (C) (D)
1. (III) (IV) (I) (II)
67. The incorrect statement regarding enantiomers,
2. (II) (I) (IV) (III)
among the following, is:
3. (IV) (III) (II) (I)
1. Enantiomers have an identical refractive index.
4. (IV) (II) (I) (III)
2. Enantiomers have the same chemical properties.
Enantiomers are superimposable mirror images of
3.
each other.
71. According to the law of photochemical equivalence,
4. Enantiomers have equal but opposite optical rotation. the energy absorbed (in ergs/mole) is given as:
(h = 6.62 × 10–27 ergs, c = 3 × 1010 cm s–1, NA = 6.02 ×
23 –1
68. The molecules/ions that do not contain unpaired 10 mol )
electrons among the following is:
8

1.
1.196×10

λ
1. O 2−
5

2.
2.859×10
2

2. B2 λ
16

3.
2.859×10

3. N +

2 λ
16

4. O2 4.
1.196×10

Page: 9
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

72. The major product D formed in the following 75. Propadiene, C H molecule contains: 3 4

reaction sequence is: 1. Two sp and one sp hybrid carbon atom

2

2. One sp and two sp hybrid carbon atoms

2

3. One sp and three sp hybrid carbon atoms

2

4. None of the above.

76. A mixture of gases contains H2 and O2 gases in the

ratio of 1 : 4 (w/w). The molar ratio of the two gases in
the mixture will be:
1. 1:4 2. 4:1
3. 16:1 4. 2:1

77. Match column I (Reaction) with column II (Product

formed) and mark the appropriate choice:
1. 2. Column - I Column - II
(Reaction) (Product formed)
(a) Gabriel synthesis (i) Benzaldehyde
(b) Kolbe synthesis (ii) Ethers
3. CH3 CH2 OH 4. CH3 CH2 Cl
(c) Williamson synthesis (iii) Primary amines
(d) Etard reaction (iv) Salicylic acid
73. Which product is generated when cyclohexanone
undergoes aldol condensation and is subsequently (a) (b) (c) (d)
heated? 1. (iii) (i) (ii) (iv)
2. (ii) (iii) (i) (iv)
1. 2. 3. (iv) (iii) (i) (ii)
4. (iii) (iv) (ii) (i)

3. 4. 78. Which ion is isoelectronic with Be²⁺?

1. H +

2. Li+

3. N a+

4. M g 2+

74. The standard reduction potentials at 298 K for the

following half-cell reactions are given against each. 79. What types of isomers are exhibited by the following
Zn
2+
(aq) + 2e ⇌ Zn(s)
−
−0.762V compounds?
3+ −
Cr (aq) + 3e ⇌ Cr(s) −0.740V

+ −
2H (aq) + 2e ⇌ H2 ( g) 0.000V

3+ − 2+
Fe (aq) + e ⇌ Fe (aq) 0.770V

Which is the strongest reducing agent?

1. Zn(s)
2. Cr(s) 1. Position isomer 2. Chain isomer
3. H (g)
2 3. Metamer 4. Ring chain isomer
4, F e (aq)
2+

Page: 10
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

80. 3% (W/V) solution of glucose is isotonic with 1% 84.

(W/V) solution of a non-volatile and non-electrolyte There is no effect on equilibrium constant
substance. The molecular mass of the substance would Assertion if inert gas is added to the reaction
be: (A): A + B ⇌ C
(g) (g) (g)

1. 180 g/mol
Reason Equilibrium constant changes only with
2. 360 g/mol
(R): temperature.
3. 420 g/mol
4. 60 g/mol
In light of the above statements choose answer from the
81. A compound that does not undergo SN1 reaction options given below:
Both (A) and (R) are True and (R) is the correct
with OH- is: 1.
explanation of (A).
1. 2. Both (A) and (R) are True but (R) is not the correct
2.
explanation of (A).
3. (A) is True but (R) is False
4. Both (A) and (R) are False.
3. 4.

85. For the reaction A(g)→(B)(g), the value of the

equilibrium constant at 300 K and 1 atm is equal to
100.0. The value of ΔrG for the reaction at 300 K and 1
82. The number of unpaired electrons in Ni and Ni2+,
respectively, are (Z of Ni = 28) atm in J mol–1 is – xR, where x is:
1. 2, 2 (R = 8.31 J mol–1 K–1 and ln 10 = 2.3)
2. 2, 4 1. 1400
3. 2, 0 2. 1380
4. 4, 2 3. 1360
4. 1340
83. Five moles of an ideal gas at 1 bar and 298 K is
expanded into vacuum to double the volume. The work 86. Which compound is used to treat lead poisoning?
done is: 1. D-penicillamine
1. C (T − T )
V 2 1
2. Desferrioxime B
2. -RT (V − V )
2 1
3. Cis-platin
3. -RT ln (V /V )
1 2
4. Ethylenediamine tetraacetic acid
4. Zero

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Contact Number: 9667591930 / 8527521718

87. Identify the graph that correctly depicts the variation 89. The product that cannot be formed in the following
of momentum with the de-Broglie wavelength of a reaction is:
particle.

1. 2.

1.

2.
3. 4.

3.

88. In Lassaigne's extract of an organic compound, both

nitrogen and sulphur are present, which gives blood red 4.
colour with Fe due to the formation of:
3+

1. [Fe(SCN)] 2+

2. Fe [Fe(CN) ] ⋅ xH O
4 6
3
2

3. NaSCN
4. [Fe(CN) NOS]
5
4−
90. The rate law for the dimerisation of N O is:
2

d[NO2 ] 2
− = k[NO2 ]
dt

The value of the specific rate constant, k can be changed

by:
1. Doubling the total pressure on the system.
2. Doubling the temperature.
3. Both of (1) and (2)
4. None of the above.

Page: 12
 Custom Practice Test - 01-Feb
Contact Number: 9667591930 / 8527521718

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