KEAM 2017 Question Paper Physics & Chemistry

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PAPER _I PHYSICS & CHEMISTRY-20l7
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Phy-Chy-r-All20t7 2

PLEASE ENSURE THAT TIIIS QUESTION BOOKLET CONTAINS
120 QUESTIONS SERIALLY NUMBERED FROM 1 TO 120.
PRINTED PAGES 32

1 A person observes that the ful1 length of a train subtends an angle of 15
length of
degrees. If the distance between the train and the person is 3 km, the
the train, calculated using parallax method, in meters is
(A) 4s @) 4szr (C) 2s0n
(D) 2so (E) 4so
.,
In a measurement, the random error
(A) can be decreased by increasing the number of readings and averaging
them
(B) can be decreased by changing the person who takes the reading
(c) can be decreased by using new instrument
(D) can be decreased by using a different method in taking the reading
(E) can never be decreased

3 In order to measure the period of a single pendulum using a stop clock' a
sfudentrepeatedtheexperimentforl0timesandnoteddownthetimeperiod
for each experiment as 5.1, 5.0, 4-9,4'9,5'1, 5'0, 4'9,5'l' 5'0' 4'9 s' The
correct way of expressing the result for the period is
(A) 4.99 s (B) 5.0 s (C) 5'00 s
(D) 4.9 s (E) 5.1 s

Phy-ChyJ-A1/2017 J [P.T.O.

4 The following figure gives the movement of an object. Select the
correct
statement iiom the given choices

50
45
40

>1()
'' 25
Bro
(.)
Q 15
a'-
l0
5
0
0 510 15 20 2s 30 35 40 45 50
Time (s)

(A) The total distance travelled by the object is 975 m
(B) The maximum acceleration of the object is 2 m/s2
(c) The maximum deceleration happened between 25ft and 35rh seconds
(D) The object was at rest between lOth and l5th seconds
(E) At 40th second, the object was decelerating

5 Two objects, P and Q, travelling in the same direction starts from
rest. while
the object P starts at time r : 0 and the object e starts later at t: 30 min. The
object P has an acceleration of 40 knr,/lr2. To catch p at a distance
of 20 km, the
acceleration ofQ should be
(A) 40km/h2- (B) 80km/h2 (c) 100kn/h,
(D) 120km/h, (E) l60km/h2

Phy-Chy-l-All20l7 4

6 A train of length L moves with a constant speed v,. A person at the back of the
tain fires a bullet at time /:0 towards a tarSet which is at a distance of D (at
time r : 0) from the front of the train (on the same direction of motion).
Another person at the front of the train fires another bullet at time /: T towards
the same target. Both bullets reach the target at the same time. Assuming the
speed of the bullets, V6, are s:rne, the length of the train is
(A) Tx(VD+2VI) (B) Tx(Vr+Vr) (c) 2 xf x (v6+v1)
(D) 2xT,(Vr-V) (E) Tx(Va-V)

1 From the ground, a projectile is fired at an angle of60 degrees to the horizontal
with a speed of 20 m/s. Take acceleration due to gravity as l0 m/s2' The
horizontal range of the projectile is
(A) 10.6m (B) 20 m (C) 20''6 m
@) a0.6m @) a00.6m

8 Apersonfromatruck,movingwithaconstantspeedof60km/h,throwsaball
upwards with a speed of 60 km/h. Neglecting the effect of rotation of
Earth'

choose the correct answer from the given choices
(A) The person cannot catch the ball when it comes down since the truck is
moving
(B)Thepersoncancatchtheballwhenitcomesdown,ifthetruckisstopped
immediatety after throwing the ball
(C) The person can catch the ball when it comes down, if the truck moves
with speed less than 60 km/h but does not stop
(D) The person can catch the ball when it comes down, if the truck moves
with speed more than 60 km/h
(E)Thep"r.or,"urrcatchtheballwhenitcomesdown,ifthetruckcontinues
to move with a constant speed of 60 km/h

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9 A body of rnass 2m moving with velocity v makes a head on elastic colrision
with another body of mass m which is initialy at rest. Loss of kinetic energy
of
the colliding body (mass 2z) is
(A) 1/9 0f its initial kinetic energy (B) 1/6 0f irs initial kinetic energy
(c) ll4 of its initial kinetic energy (D) r/2 of itsinitial kinetic energy
(E) 8/9 of its initial kinetic energy
10. Displacement, x (in meters), of a body of mass I kg as a
function of time, t, on
a horizontal smooth surface is given as x :2f . The work done in the first one
second by the external force is
(A)1I @)2J (c)4J
(D) 8J (E) 16J
11. A massless spring of length / and spring constant t is placed vertically
on a
table. A ball of mass z is just kept on top of the spring. The
maximum velocity
ofthe ball is

@ c\E @cC (c) 2s tr
1/t
@ 2g\E @ c\E
12. Under the action of a constant force, a particle is experiencing
a constant
acceleration. The power is
(A) Zero (B) Positive constant (C) Negative constant
(D) Increasing uniformly with time (E) Decreasing uniformly with time

Phy-Chy-I-All2017 6

13. A copper wire with a cross-sectional area of 2 ' lOi *' has a free electron
density equal to 5 x 1022 /cm3. If this wire carries a current of 16 A, the drift
velocity of the electron is
(A) I nrls (B) 0.1m/s (C) 0'01 m/s
(D) 0.001 m/s (E) 0.0001n/s

t4. The resistance of the h.rngsten wire in the light bulb, which is rated at
l2OVl 75 W and powered by a 120 V direct-current supply, is
(A) 0.370 (B) l.2O (C) 2.660
(D) l92O (E) 9x l03o

15. The values of the currents 11, 12, and +
e f
13 flowing through the circuit given 4V
below is
4C) l2
(A) rr :-3 A,lz:2 A, 13: -1 A ll
(B) I, : 2 A,l2: -3 A, Ir : -l A b
+
c
(c) Ir:3A, Ir:-1 A, 13:-2A l0v 6C) 13I
(D) Ir : I A,12:-3 A,\:14
d
(E) Ir : 2 A,lr: -1A, 13 : -3 4 a
2A
16. A silver wire has temperature coefficient of resistivity 4x10-3/"C and its
resistance at 20"c is l0 o. Neglecting any change in dimensions due to the
change in temperafure, its resistance at 40"C is
(A) 0.8 O (B) 1.8 O (c) e.2 o
(D) 10.8 o (E) 11.6 O

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17. A charge Q placed at the center of a metallic spherical shell with inner and
outer radii R, and R2 respectively. The normar component of the
electric field
at any point on the Gaussian surface with radius between R1 and R2 will be

(A) zero (B) a (c) a
anRl anRZ
(D) a (E) a
4n(R1-R2)2 4r(R2-R1)2

18. A sphere ofradius R has a uniform volume charge density, p. The magnitude of
electric field at a distance r from the center of the sphere, where r > R, is

(A) ---q- (B) PR: (c) PR1
4negr' tor' Eorz
3
pR pR2
(D) (E)
3eg12 4egr2

19. Five equal point charges with charge Q:10 nC are located at x : 2,4, 5, l0 and
20 m.If eo=ll}-e / 36nl F/m, thenthe potential at the origin (.r : 0) is
(A) 9.9 V (B) ll.l v (c) e0 v
(D) 99V (E) 111V

20. Two infinitely long parallel plates of equal areas, 6 cm2, are separated by a
distance of 1 cm. while one of the plates has a charge of +10 nc and the other

10-9
has -10 nC. The maguitude of the electric field betweer
r the plates, rt eo =3*

F/m, is
(A) 0.6nkY/m (B) 6n kY/m (C) 600r kVlm
(D) 60zr V/m (E) 6n V/m

Phy-Chy-[-All2017 8

A proton moves with a speed of 5.0 x 106 m/s along the x-axis' lt enters
a
21.
at an
region where there is a magnetic field of magnitude 2.0 Tesla directed
angle of 30o to the x-axis and lying in the ry plane' The magnitude
of the
magnetic force on the Proton is
(A) 0.8 , l0-r3 N (B) 1.6 x l0.t-3 N (c) 4'0 x l0-r3 N
ioi s.o x lo-rr N (E) 16 x lo-'3 N

22 A long straight wire of radius R carries a steady current' 16 ' uniformly
distributedthroughoutt}recross-sectionofthewire.Themagneticfieldata
> R' is
radial distance r from the center of the wire, in the region r

(A)
f# (u)H (c) PoIoR2
2w

(D)
*1 61 u{
2nR'

23. If the cyclotron oscillator frequency is 16 MHz, then what should be the
operating magnetic freld for a"cel"rating the proton of mass
l'67 x l0r? kg?
(A) 0.3342t T (B) 3.34t T (Q 33.azrT
(D) 334nT (E) 334OnT

24 The speed oflight in vacuum is equal to
(A) Poeo (B) PSeB (q .6Eo
I I
(D)
Poeo
(E)
6
25. A comet orbits around Sun in an ellipical orbit' Which of the following
quantities remains constant during the course of its motion?
(A) Linear velocity (B) Angular velocity (C) Angular momentum
(D) Kinetic energy (E) Potential energy

9 lP.T.O
Phy-ChyJ-Al/2017

26. consider a satellite moving in a circular orbit around
Earth. If K and v denote
its kinetic energy and potential energy respectively then (Choose
the
convention where V:0 as r -+
-)
(A) K:v (B) K:2v (c) v:2K
(D) K: -2 v (E) v: _2 K

27. Assuming the mass of Earth to be ten times
the mass of Mars and its radius to
be twice the radius of Mars and the acceleration
due to gravity on the surface of
Earth to be l0 m/s2, the acceleration due to gravity
on the surface of Mars is
given by

!11
02m1J (B) 0.4 m/s2 (C) 2 n/s2
(D) 4 m/s' (E) 5 m/s2
28. The semi-major axis of the orbit of Satum is
approximately nine times that of
Earth. The time period of revolution of Saturn
is approximately equal to
(A) 81 years (B) 2Tyears (C) 729years
(D) VaTyears (E) gyears

29. A particle of mass 3 kg, attached to a spring with force constant
4g N/m
executes simple harmonic motion on a aictionless
horizontar surflace. The time
period ofoscillation of the particle, in
seconds, is
(A) \t/4 (B) n/2 (C) 2n
(D) 8n (E) r/8

Phy-Chy-I-A I /20 I 7 l0

motion at
30. The position and velocity of a particle executing simple hannonic
t:0 are given by 3 cm and 8 cm/s respectively. If the angular frequency of the
particle is 2 rad/s then the amplitude of oscillation, in centimeters' is
(A) 3 (B) 4 (c) s
(D) 6 (E) 8

(D'' The
31. A simple harmonic motion is represented by, x(r) = sin2 o t -2 cos2
angular frequency of oscillation is given by
(A)ro (B)2o (C)ao
(D) al2 @) ro/4

32. A transverse wave is propagating on a stretched string whose mass per unit
the wave in
length is 32 glm, The tension on the string is 80 N' The speed of
the string is
(A) 5/2mis (B) Jtz nYs (C) 2/5rn/s
(D) Jzls n/s (E) 50nr/s

33.Considerthepropagationofsound(withvelocity330m/s)inapipeoflength
l.5mwithoneendclosedandtheotheropen'Thefrequencyassociatedwith
the fundamental mode is
(A) llHz (B) 55Hz (C) 110H2
(D) 165 Hz (E) 275H2

pipe of length
34. A standing wave propagating with velocity 300 m/s in an open
4 m has four nodes' The frequency of the wave is
(A) 75Hz @) 100H2 (C) 150H2
(D) 300 Hz (E) 600 Hz

Phy-ChyJ-Al/2017 11 lP.T.o

35. consider a vehicle emitting sound wave of frequency
700 Hz moving towards
an obseryer at a speed 22 rnls. Assuming the
observer as well as the medium to
be at rest and velocity of sound in the medium to
be 330 m/s, the frequency of
sound as measured by the observer is
(A) 252514H2 (B) t960t3Hz (C) 2240/3Hz
(D) 750H2 (E) 5625t7H2
36. The x+ plot shown in the figure below describes
the motion of the particle,
along x-axis, between two positions A and B. The particle
passes through two
intermediate points P1 and p2 as shown in the figure

x

t
(A) The instantaneous velocity is positive at pt
and negative at p2
(B) The instantaneous velocity is negative
at both pr a;d p2
(c) The inslantaneous velocity is negative at p1 and positive p2
at
(D) The instantaneous velocity is positive at p1 p2
both and
(E) The instantaneous velocity is always positive

Phy-Chy-l-Al/2017 t2

the absence of
37. A ball falls from a table top with initial horizontal speed v6. In
air resistance, which of the following statement is correct
(A) The vertical component of the acceleration changes with time
(B) The horizontal component of the velocity does not change with time
(C) The horizontal component of the acceleration is non zero and finite
on Vs
iO) ffr. time taken by the ball to touch the ground depends
if; fn vertical component of the acceleration varies with time
38. Amanofmass60kgclimbeddownusinganelevator.Theelevatorhadan
acceleratio, 4 ms-2. If the acceleration due to gravity is
10 ms-2' the main

apparent weight on his waY down is
(A) 60 N (B) 240 N (c) 360 N
(D) 840 N (E) 3600 N

39. A uniform rod of length of I m and mass T
of 2 kg is attached to a side support at O o
as shown in the figure. The rod is at
P

equilibrium due to upward force T acting
' at P. Assume the acceleration due to
gravity as l0 m/s2. The value of T is
(A) 0
(B) 2N
(c) sN
(D) l0N
(E) 20 N

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40 A capillary tube of radius 0.5 mm is immersed in a beaker of mercury.
The
level inside the tube is 0.8 cm below the resonance
and angle of contact is
120'' what is the surface tension of mercury if the mass
density of mercury is
p: 13.6 , 103 kgm 3 and acceleration due to gravity is g: 10 m/s2?
(A) 0.225 N/m (B) 0.s44 N/m (C) 0.28s N/m
(D) 0.375 N/m (E) 0.425 N/m
41. which of the following statements related to stress-strain relation
is correct
(A) Stress is linearly proportional to stain irrespective of the magnitude
of the
strain
(B) Stress is linearly proportional to strain above
the yield point
(c) Stress is linearly proportional to strain for stress
much smaller than at the
yield point
(D) Stress-strain cule is same for all materials
(E) Stress is inversely proportional to strain

42. The lower edge of a square slab of side 50 cm and
thickness 20 cm is rigidly
frxed to the base of a table. A tangential force of
30 N is applied to the slab.
If the shear moduri of the material is 4 , l0r0 N/m2, then displacement
of the
upper edge, in meters, is '
(A) 4, to'.t: (B) 4 x 16-ro (c) 6 x 16-ro
(D) 6xl0 12 (E) 8x16-ro
43 Initially a beaker had r00 g of water at temperature 90oc.
Later another 600 g
of water at temperature 20oC was poured into the beaker.
The temperature, T,
of the water after mixing is
(A) 20"c (B) 30.c (c) 45.C
(D) 55.C G) 90.c

Phy-Chy-l-A112017 t4

M. Match the following:
r) Isothermal Process l)
r) Isobaric process 2) ^Q:0
AV: O
IID Isochoric process 3) AP:0
IV) Adiabatic process 4) AT:0
(A) t-4,, lr-3, III-2, rv-l
(B) t-3, ll-2 III-1, IV-4
(c) t-1, ll-2, III-3, IV-4
(D) t-4, ll-2, III-3, IV-l
(E) I-1, II-4, lll-2, lv-3

45 For an ideal gas, the specific heat at constant pressure C, is greater than the
specific heat at constant volume C". This is because
(A) There is a finite work done by the gas on its environment when its
temperature is increased while the pressure remains constant
(B) Theie is a finite work done by the gas on its environment when its
pressue is increased while the volume remains constant
(C) ihere is a finite work done by the gas on its environment when its
pressure is increased while the temperafure remains constant
@1 ine pressue of the gas remains constant when its temperature remains
constant
(E) The internal energy of the gas at constant pressure is more than at constant
volume

46. Which of the following statements is correct?
(A) Light waves are transveise but sound waves and waves on strings are
longitudinal
(B) Sound waves and waves on a string are transverse but light waves are
longitudinal
(C) Light waves and waves on a string are transverse but sound waves are
longitudinal
(D) Light waves and sound waves are tansverse, but waves on stnngs are
longitudinal
(E) Light waves, sound waves and waves on a string are all
longitudinal

l5 lP.T.O.
Phy-Chy-I-All20l7

47. In Young's double slit experiment, if the separation between the
slits is halved,
and the distance between the srits and the screen is
doubled, then the fringe
width compared to the unchanged one will be
(A) Unchanged (B) Halved (C) Doubled
(D) Quadrupled (E) Fringes will disappear

48 The phase velocity of a wave described by the equation
V:vo .io fftr + ror +I )
i. \ 2)
x
(A) (B) Vo (c) 0)
t (D k
7t
(D) ;; (E) vo

49. The direction ofpropagation of electromagnetic wave is along
(A) Electric field vector, E (gl Magneric field vector, E
(c) E.B @) ExB (E) BxE
50. Assume that a radio station is about 200 km away from your
rocation and the
station operate s at 972 kHz. How rong does it take for
an erectromagnetic
signal to travel from the station to you and how many wave
crests does it send
out per second
(A) 666 ps and 9.72 x 105 crests per second
(B) 666 ps and972 x 105 crests per second
(C) 555 trts and97.2 x 107 crests per second
(D) 555 ps and 0.972 x 105 crests per second
(E) 444 ps and 9 x 106 crests per second

51. what wavelength must electromagnetic radiation have if a photon
in the beam
has the same momentum as an electron moving with
a speed LlxlO5 m/s
(Planck's constant:6.6 x l0 3aJs, rest mass of electrorr:9,
t0-'kg)?
(A) 2/3 nm (B) 2013 nm (C) aBnm
(D) 40/3 nm (E) 3/20 nm

Phy-Chy-I-A1/2017 16

52. The electric field porlion of an electromagnetic wave is given by (all variables
in SI units) E: 104 sin (6x10s r- 0.01 .r). The frequency (/) and the speed (v)
of electromagnetic wave are
(A) f:3}/nEtzandv: 1.5 x 107rn/s
(B) ,f: 9}/nkJjrz and v: 6.0 x 107 rnls
(C) f :3})lnkJtz and v: 6.0 , 107 rn/s
(D) ,f: 600lnkltzandv: 7.5 x 107 n s
(E) f:9})lnE{zandv: 8.0x 107n/s

53. Huygens' wave theory of light cannot explain
(A) Diffraction phenomena (B) Interference phenomena
(C) Photoelectric effect (D) Polarization oflight
(E) Propagationoflight

54 An electron, a neutron and an alpha particle have same kinetic energy and their
de-Broglie wavelengths arc 1"e, )'.n and X.o respectively. Which statement is
correct about their de-Broglie wavelengths?
(A) Xe>l.n>}"o (B) I"<Ln>La (C) \E<Ln<)"a
(D) Ie > },n<La (E) )..": ),n <La

55. It takes 4.6 eV to remove one of the least tightly bound electrons from a metal
surface. When monochromatic photons strike the metal surface, electrons
having kinetic energy from zero to 2.2 eY are ejected. What is the energy of the
incident photons?
(A) 2.4eV (B) 2.2eY (C) 6.8eV
(D) 4.6 eV (E) s.8 eV

56. Ifcopper and silicon pieces are heated, the resistance of
(A) each will increase
(B) each will decrease
(C) copper will increase and silicon will decrease
(D) copper will decrease and silicon will increase
(E) both does not change

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57. In an insulator, band gap is ofthe order of
(A) 0.1 eV (B) I eV (C) 5 eV
(D) 100 eV (E) 1 MeV

58. For a P-N junction diode
(A) Forward current is in mA and reverse curent is in pA
(B) Forward current is in pA and reverse current is in mA
(C) Both forward and reverse currents are in pA
(D) Both forward and reverse currents are in mA
(E) No current flows in any direction

59. For a Zener diode
(A) bothp and n regions are heavily doped
(B) p region is heavily doped but r region is lightly doped
(C) r region is heavily doped butp region is lightly doped
(D) bothp and n regions are lightly doped
(E) depletion region is very thick

60. Speech signal is in the range of
(A) 3700 to 7000 A wavelength (B) 20 Hz to 20 kllz frequency
(C) 300 to 3100 Hz frequency (D) 540 to 1600 kHz frequency
(E) 88 to 108 MHz frequency

61. Wavelength of the wave with 30 MHz frequency is
(A) 1 cm (B) 10 cm (C) 100 cm
(D) 1000 cm (E) 10000 cm

62 To transmit a signal of frequency, ro,, with a carrier frequency, rrr., in AM
transmission, the bandwidth of the filter and amplifier is
(A) or. (B) 2a. (C) ro"
(D) ro. - ro. (E) ro. + ro-

Phy-Chy-I-Al/2017 18

63. If a magnet is dropped through a vertical hollow copper tube then
(A) the time taken to reach the ground is longer than the time taken if the tube
was made out of plastic
(B) the magnet will get atkacted and stick to the copper tube
(C) the time taken to reach the ground is longer than the time taken if the tube
was made out of stainless steel
(D) the time taken to reach the ground does not depend on the radius of the
copper tube
(E) the magnet will be repelled away by the tube

64. Consider a circular wire loop of radius R spiruring about a diametrical chord
which is perpendicular to a uniform magnetic field B=Boft

(A) The magnitude of the induced EMF in the loop is maximum when the
plane of the loop is perpendicular to E
(B) Flux through the loop is minimum when the plane of the loop is
perpendicular to E
(C) The direction of induced current remails same during the spinning motion
ofthe loop
(D) EMF induced will be the same for a larger radius of the loop in the same
field
(E) No EMF will be induced since magnetic field is constant

05 An electric motor when loaded has an effective resistance of 30 Q and an
inductive reactance of 40 O. If the motor is powered by a source with
maximum voltage of 420 V, the maximum current is
(A) 6 A (B) 8.4 A (C) l0 A
(D) 12 A (E) 13 A
6sCu
66. Which of the following particle when bombards on will tum into 66Cu
(A) Proton (B) Neutron (C) Electron
(D) Alpha particle (E) Deutron

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67. CO- ion moving with kinetic energy of 20 keV dissociates into O- and C which
move along the parent ion direction. Assuming no energy is released during
dissociation, the kinetic energies of the daughters (K.E)o- and (K.E)6 are
related as
(A) (K.E)o- :6.E)c (B) (K.E)o- / K.E)c : t6tt2
(c) (K.E)o / 6.E)c : r2tr6 (D) (K.E)o- / 6.E)c : r6t28
(E) (K.E)o- / G.E)c :28tr6
68 If the rms value of sinusoidal input to a full wave rectifier is V6 /J7 then the
rms value of the rectifier's output is

(A) + (B)
Y&
T (c)
v3
2

(o) tr2v; (E) 2Vo2
69. Eight grams of Cu66 undergoes radioactive decay and after 15 minutes only I g
remains. The half-life, in minutes, is then
(A) ls ln(2)/ln(8) (B) ls ln(8)/ln(2) (C) lsl8
(D) 8/15 (E') 15ln(2)

70. For a light nuclei, which of the following relation between the atomic
number (Z) and mass number (A) is valid
(A) A:z/2 (B) z:A (C) z:N2
(D) z:A2 (E) A:22
71. A wheel rotating at 12 revls is brought to rest in 6 s. The average angular
deceleration in radls2 of the wheel during this process is
(A) an (B) 4 (c) 72
(D) l/n (E) n
72 A torque of 1 N.m is applied to a wheel which is at rest. After 2 seconds the
angular momentum in kg.m2ls is
(A) 0.5 (B) 1 (c) 2
(D) 4 (E) 3

Phy-Chy-I-Al/2017 20

13. Uncertainty principle is valid for
(A) Proton (B) Methane (c) Both (A) and (B)
(D) I pm sized platinum particles (E) I pm sized NaCl particles

74. The energy of an electron in the 35 orbital (excited state) ofH-atom is
(A) -l.5 eV (B) -13.6 eV (C) -3.4 eV
(D) -4.53 eV (E) 4.53 eV

75. Among the following, the molecule that will have the highest dipole moment is
(A) H, (B) HI (C) HBr
(D) HCI (E) HF

16. Which of the following pair have identical bond order?
(A) CII and Not (B) CN- and Oi (C) CN- and CM
(D) NOt and Oi (E) Ot and CM

77 A gas will approach ideal behaviour at
(A) Low temperatue and low pressure
(B) Low temperature and high pressure
(C) High temperature and low pressure
(D) High temperature and high pressure
(E) Low volume and high pressure

78. Pressure of ideal and real gases at 0 K are
(A) >0and0 (B) <0and0 (C) 0 and 0
(D) >0and>0 (E) 0and>0

Phy-ChyJ-A1/2017 2l lP.T.O

79. For the process
A 0, 0.05 atm,32"C)---, A (e,0.05 atm, 32'C),
The correct set of thermodynamic parameters is
(A) AG:0 and AS : -ve (B) AG:0 and AS: +ve
:
(C) AG +ve and AS:0 (D) AG : ve and AS :0
(E) AG:0 and AS :0

80. Mixing of N2 and H2 form an ideal gas mixfure at room temperature in a
container. For this process, which of the following statement is true?
(A) AH : 0, AS,,..oun6;n, : 0, AS,r,1.. : 0 and AG : ve
(B) AH : 0, AS.u.,oun6i,g : 0, AS,r.1.. > 0 and AG : ve
(C) AH > 0, AS,,,,o,n6;ng : 0, AS.r.,". > 0 and AG : -ve
(D) AH < 0, AS.,..oun6;ng > 0, As"yrt". < 0 and AG : -ve
(E) AH : 0, AS.,,,o,n6;ng : 0, AS,y,r.- < 0 and AG : -ve

81. Which of the following is not true about a catalyst?
(A) Mechanism of the reaction in presence and absence of catalyst could be
different
(B) Enthalpy of the reaction does not change with catalysts
(C) Catalyst enhances both forward and backward reaction at equal rate
(D) Catalyst participates in the reaction, but not consurned in the process
(E) Use of catalyst cannot change the order of the reaction

82. In the ln K vs. TI plot of a chemical process having ASo > 0 and AHo < 0 the

slope is proportional to (where K is equilibrium constant)
(A) -laH'l (B) IAH'I (c) as.
(D) -AS" (E) ac"
Spacp for rough work

Phy-ChyJ-A I /20 I 7 22

83. For the process
t
---B, at 298 K, AGo is 163 kJ mol r. The composition of the reaction
;A
mixture is [B]: I and [A] : 10000. Predict the direction of the reaction and
the relation between reaction quotient (Q) and the equilibrium constant (K)
(A) forward direction because Q > K
(B) reverse direction because Q > K
(C) forward direction because Q < K
(D) reverse direction because Q < K
(E) it is at equilibrium as Q: K

84 Solubility product (K*) of saturated PbCl2 in water is 1.8 x 104 mol3 dm e
What is the concentration of Pb2+ in the solution?
(A) (0.45 , l0*)"'mol dm-3
(B) (1.8 , l0*)"'mol dm-3
(C) (0.9 , l0*)'6 mol dm-3
(D) (2.0, l0*)"'mol dm 3

(E) (2.45, l0-)"' mol dm-3

85. The freezing.point of equimolal aqueous solutions will be highest for
(A) C6HsNHjCl (B) AgNO3 (C) Ca(NOr)z
(D) La(NO3)3 (E) D-fructose

E6. The molality of the 3M solution of methanol if the density of the solution is
0.9 g cm-3 is
(A) 3.73 (B) 3.0 (C) 3.33
(D) 3.r (E) 3.2

Phy-Chy-I-A1/2017 23 lP.T.O.

87. Consider a fuel cell supplied with I mole of H2 gas and 10 moles of 02 gas. If
fuel cell is operated at 96.5 mA current, how long will it deliver power?
(Assume I F : 96500 C / mole of electrons)
(A) 1xl06s (B) 0.5x106s (C) 2x106s
(D) 4xl06s (E) 5x106s

88 Consider the equilibrium obtained by elecnically connecting zinc-amalgam
(Zn(Hg)) and HgO electrodes in mercury cell,
Zn(Hg) + HgO(s) +ZnO(s) + HC(r)
Under this equilibrium, what is the relation between the potential of the Zn(Hg)
and HgO electrodes measured against the standard hydrogen electrode?
(A) Zn(Hg) electrode potential is equal to HgO electrode potential
(B) Zn(Hg) electrode potential is more than HgO electrode potential
(C) HgO electrode potential is more than Zt(Hg) electrode
(D) Cell voltage at above said equilibrium is I .35 V
(E) Both (C) and (D)

89. 10 g of MgCO3 decomposes on heating to 0.1 mole CO2 and 4 g MgO. The per
cent purity of MgCO3 is
(A) 24% (B) 44% (C) s4%
(D) 74% (E) 84%

90 The compound Na2CO3.x H2O has 50 % H2O by mass. The value of '1" is
(A) 4 (B) s (c) 6
(D) 7 (E) 8

91. Hybridisation of carbon in CHt
(A) ,p' (B) rp' (C) spld
(D) sp3& (E) sp2d

Phy-Chy-I-Al/2017 24

92 The common features among CO, CN- and NOj are
(A) Bond order three and isoelectronic
(B) Bond order three and weak field ligands
(C) Bond order two and n-acceptors
(D) Bond order three and n-donors
(E) Isoelectronic and strong field ligands

93. Which of the following is covalent?
(A) NaCl (B) KCI (C) BeCh
(D) MgCl, (E) CaCb

94. One mole of an unknown compound was treated with excess water and
resulted in the evolution of two moles of a readily combustible gas. The
resulting solution was treated with CO2 and resulted in the formation of white
turbidity. The unknown compound is
(A) Ca (B) CaH, (C) Ca(oH)z
(D) Ca(NOr)z @) CaSOa

95. When potassium is reacted with water, which compound(s) is (are) formed
preferentially?
(A) K2O (B) KO, (C) BothKzOandKO2
(D) K2O2 (E) K2O3

96. Purification of aluminium by elecholytic refining is called
(A) Hall's process (B) Froth flotation process
(C) Bayer's process (D) Hoope's process
(E) Serpeck's process

Phy-ChyJ-A1/2017 25 lP.T.O

97 Select the most appropriate statement
In BF3
(A) All the bonds are completely ionic
(B) The B-F bond is partially ionic
(C) B-F bond has partial double bond character
(D) Bond energy and bond length data indicates single bond character of the
B-F bond
(E) A11 the bonds are covalent

98. The inert gas found most abundant in the atmosphere is
(A) He (B) Ne (C) Ar
(D) Kr (E) xe

99 When MnO2 is fused with KOH and KNO2, a coloured compound is formed.
Choose the right compound with the appropriate colour
(A) K2MnOa, green (B) KMnOa, purple (C) Mn2O3, brown
(D) Mn3Oa, black (E) MnO2, black

100. Identify the case(s) where there is change in oxidation number
(A) Acidified solution of CrOa2-
(B) SO, gas bubbled through an acidic solution of Cr2O12-
(C) Alkaline solution of Cr2O12'
(D) Ammoniacal solution of CrOa2-
(E) Aqueous solution of CrO2Cl2 in NaOH

101. Water gas is produced by
(A) Passing steam over red hot coke
(B) Passing steam and air over red hot coke
(C) Burning coke in excess air
(D) Burning coke in limited supply of air
(E) Both (A) and (B)

Phy-Chy-I-A1/2017 26

102. The volume of oxygen liberated at STP from 15 rnl- of 20 volurne H2O2 is
(A) l00ml- (B) ls0ml- (C) 200mL
(D) 250 mL (E) 300 mL

103. Corundum is mineral of aluminium.
(A) Silicate (B) Oxide (C) Double salt
(D) Sulphate (E) Nitrate

104. The solution which does not produce precipitate when treated with aqueous
K2CO3 is
(A) BaCl, (B) CaBr2 (C) MgCl,
(D) Na2SOa (E) Pb(NO3),

105. If the boiling point difference between the two liquids is not much, then
_ method is used to separate them.
(A) simple distillation (B) distillation under reduced pressure
(C) steam distillation (D) fractional distillation
(E) differential extraction

106. Lassaigne's test (with silver nitrate) is commonly used to detect halogens such
as chlorine, bromine and iodine but not useful to detect fluorine because the
product AgF formed is
(A) volatile (B) reactive (C) explosive
(D) soluble in water (E) a liquid

L07. Protein is a polymer made of
(A) carbohydrates (B) amino acids (C) nucleic acids
(D) carboxylic acids (E) polycyclic aromatics

108. The letter'D' in D-carbohydrates represents
(A) dextrorotation (B) direct synthesis (C) confrguration
(D) mutarotation (E) optical activity

Phy-ChyJ-A1/2017 27 lP.T.O

109. Phenol is a highly corrosive substance, but its 0.2 per cent solution is used as
(A) antibiotic @) antiseptic (C) disinfectant
(D) antihistamine (E) antacid

110. Name of the following reaction is
H H
1) COz NaOH
ozH
2) H2SOa
(A) Reimer-Tiemann (B) Kolbe-Schmitt (C) Cannizzaro
(D) Gattermann (E) Gattermann-Koch

l1l. X and Y in the below reaction are -------------- and , respectively.

c615-co2H+x heat )c6H5-cocl H d/BaSOa
quinoline
Y

(A) SOCI, andCrHsCHO (B) (COCI), and C6H5CH3
(C) SOCI2 and CrHsCHr (D) (COCD, and C6H5CH2OH
(E) SOCI2 and CeHsCHzCl

ll2. The reaction of propene with HBr in presence of peroxide proceeds through the
intermediate
(A) H3C-CH-CH3 (B) H3C-CH-CH2Br
Br
(c) nrc-Cn-tn, (D) H3C-CHz-CHz
(E) None of the above

Phy-Chy-I-A1/2017 28

I13.. The major product P formed in the following reaction is
Cl2,FeCl Cl2,FeCl
X P

(A) I (B)cl (c) cl I

(D) cl 1(E)
CI

ll4, The correct increasing order of the acid strength of acids, butyric acid (I),
2-chlorobutyric acid (ID, 3-ctrlorobutyric acid (II! and 2,2-dichlorobutyric acid
(IV) is
(A) I<II<III<IV (B) III<II<IV<I (C) I<III<II<IV
(D) III<I<II<IV (E) rV<III<II<I

115. Cycloheptatrienyl cation is
(A) non-benzenoidand non-aromatic (B) non-benzenoid and aromatic
(C) benzenoid and non-aromatic (D) benzenoid and aromatic
(E) non-benzenoidandanti-aromatic

Phy-Chy-I-All20l7 29 [P.r.o

116. The correct order of increasing reactivity of the following alkyl halides,
CH3CH2CH(Br)CH: (I), CH3CH2CH2CHTBT (II), (CHr)2CC1CH2CH3 (III) and
CH3CH2CH2CI (IV) towards Sy2 displacement is
(A) I<II<m<IV (B) III<I<IV<II (C) m<I<II<IV
(D) II<IV<I<III (E) I<III<II<IV

ll7. The strongest base among the following is
(A) amide ion (B) hydroxide ion (C) trimethylamine
(D) ammonia (E) aniline

118. The condensation reaction between one equivalent of acetone and two
equivalents of benzaldehyde in presence of dilute alkali leads to the formation
of
(A) benzalacetophenone (B) benzylideneacetone
(C) dibenzylideneacetone (D) benzoic acid and acetic acid
(E) only benzoic acid

119. The product Y for the below reaction is
NH2
CHCIr/3KOH Y
N C
ilt
NH2 NH2 COOH
HO COOH
(A) (B) (c) (D) (E)

Phy-Chy-I-Al/2017 30

120. The product formed in the following reaction is

(cH3co)2o CI-CH2{OCl
2 product
3

(A) NI{-cocH3 (B) H,fe- NII-COCH3
CF COCI

(c) NH2 (D) NHz
H3c o Hp
H2
c[-H2c
ocl
(E) NH2
CIH,C o
H

Phy-Chy-I-Al/2017 3t lP.T.O.

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