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TOPICS OF THE TEST
Test No. 8
Complete Syllabus of Class XI
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PART - A (PHYSICS)
SECTION - IStraight Objective Type Questions
This section contains 25 multiple choice questions
numbered 1 to 25. Each question has 4 choices (1), (2),
(3) and (4), out of which ONLY ONE is correct.
Choose the correct answer :
1. A motor boat travels across a river from a point Ato
point Bon the opposite bank along the line AB
making an angle with the direction of flow of the
river. The flag on the mast of the motor boat makes
an angle with direction of motion. Find the speed
of motor boat with respect to ground. Assuming
velocity of wind is u perpendicular to the stream.
Assume2
(1)cos( )
sin
u
(2)
sin2
sin
u
(3)sin
cos( )
u
(4)
sin
cos
u
2. Two intersecting straight lines move translationally,perpendicular to their orientation with speed v1and
v2. If the lines are orthogonal to each other, the
speed of the point of intersection is
(1) 2 21 2
v v (2)2 2
1 2
2
v v
(3)2 2
1 2
2
v v(4) 2 2
1 2 1 2v v v v
TEST - 8Time : 3 Hrs. MM : 360
3. A bus is 2 m long and 3 m wide. The bus moves on a
straight road with speed 10 m/s. A bullet hits it in a
direction making an angle 37 with the direction of
motion of bus as observed from road. The bullet enters
the one edge and comes out from diagonally opposite
edge as shown in the figure. Then time taken by the
bullet to cross the bus and speed of bullet are
respectively
3m
2 m
10 m/s
(1) 2 s, 20 m/s (2) 1 s, 25 m/s
(3) 0.2 s, 25 m/s (4) 2 s, 15 m/s
4. A block of mass mrests on a bracket of mass Mas
shown. The coefficient of friction between the masses
Mandmis s. The bracket rests on a smooth horizontal
surface. The maximum force Fthat can be applied on
the system for no relative motion betweenmandMis
M
m
F
= 0
(1)( )
( 2 )
sMg m M
M m
(2)
( )
smg
M m
(3)( )
sMg
M m
(4)
( )
( 2 )
smg M m
M m
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5. A particle of mass mmoves in theXYplane with a
velocity valong the straight line AB. If the angular
momentum of the particle with respect to origin Ois
LA
when it is at Aand LBwhen it is at B, then
Y
X
BA
O
(1) LA> L
B
(2) LA= L
B
(3) The relationship between LA and L
B depends
upon the slope of the line AB
(4) LA< L
B
6. A particle of mass 1 kg is given a velocity 2 m/s
along positivex-axis at origin. A variable force is to
act on particle given by F = 2 3x, where x is
position of particle alongx-axis. If the force continuesto act, the range in which particle oscillates is
y
x
2 m/s
m= 1 kg
(1) 2 2
to3 3
x x
(2) 4 4
to3 3
x x
(3) 2
to 23
x x
(4) x= 6 tox= +6
7. At a certain instant blockAhas a downward velocityof 0.8 m/s. At this instant, velocity of block B is
BA
(1) 1.6 m/s up (2) 1.6 m/s down
(3) 1.2 m/s down (4) 1.2 m/s up
8. The figure shows a uniform cylinder of radius aand
weight 75 N. After drilling a cylindrical cavity in the
cylinder, weight of remaining body is 60 N. The axis
of cavity is parallel to that of solid cylinder. For
equilibrium of body, tension in the string must be
T
2
3
a Rough
(1) 2 N (2) 15 N
(3) 5 N (4) 20 N
9. A block of mass 2 kg is placed on a wedge of mass
9 kg. A force of 210 N is applied on the wedge as
shown in figure. The time after which block leaves
the contact with the wedge is [Neglect friction
everywhere]
9 kg
452 kg
10 m
210 N
(1) 2 s (2) 1
s2
(3) 2 s (4) 4 s
10. Two rods of different materials having coefficients of
thermal expansions 1and
2and Young's moduli
Y1and Y
2respectively are fixed between two rigid
walls. The rods are heated such that they undergo
the same increase in temperature. There is no
bending of rods. If1
2
2
3
and stresses developed
in the two rods are equal, then1
2
Y
Yis
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(1)3
2(2) 1
(3)2
3(4)
1
2
11. 2 kg of ice at 20C is mixed with 5 kg of water at
20C in an insulating vessel having a negligible heat
capacity. Calculate the final mass of water remaining
in the container. It is given that the specific heats ofwater and ice are 1 kcal/kg/C and 0.5 kcal/kg/C
while the latent heat of fusion of ice is 80 kcal kg1
(1) 7 kg (2) 6 kg
(3) 4 kg (4) 2 kg
12. A solid sphere of uniform density is released from
rest on an inclined plane. If it falls through a height
7 m along the inclined plane without slipping. The
speed of sphere will be [g= 10 m/s2]
(1) 10 m/s (2) 5 m/s
(3) 15 m/s (4) 7.5 m/s
13. Six moles of O2gas are heated from 20C to 35C at
constant volume. If specific heat capacity at constant
pressure is 8 cal mol1K1and R= 8.31 Jmol1K1,
what is change in internal energy of gas ?
(1) 180 cal (2) 300 cal
(3) 360 cal (4) 540 cal
14. If a satellite is moving around a planet in an elliptical
orbit of semi-major axis a0. The time period of
revolution of satellite is
(1)3
02
a
GM
(2)3
02a
GM
(3)3
0a
GM (4)
3
0
2
a
GM
15. A floating raft of mass 600 kg has 7 cm of thickness
submerged in water. When a man stands on the
raft, 8.4 cm are submerged. The mass of man is
(1) 100 kg (2) 60 kg
(3) 120 kg (4) 80 kg
16. A wire of area of cross-section 106m2is stretched to
increase its length by 0.1%. The tension produced in
the wire is 1000 N. The Young's modulus of wire is
(1) 1017N/m2 (2) 1012N/m2
(3) 109N/m2 (4) 1010N/m2
17. When two progressive waves y1= 4 sin(2x 6t) and
2 3 sin 2 62
y x t
are superimposed, the
amplitude of the resultant wave is
(1) 5 (2) 6
(3)5
3(4)
1
2
18. Angular frequency of small oscillation of the system
shown in figure is [Given, there is no slipping
between the string and pulley]
mk
( )IR
(1)2
2
Im
R
k
(2)2
k
Im
R
(3)
2
2
2
Im
R
k
(4) 2
Im
R
19. A hollow cylinder with both sides open generates a
frequency v in air. When the cylinder vertically
immersed into water by half its length the frequency
will be
(1) v (2) 2v
(3)2
v
(4)4
v
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20. A sound source is moving towards stationary listener
with1
10th of the speed of sound. The ratio of
apparent to real frequency is
(1)
29
10
(2)9
10
(3)11
10(4)
211
10
21. If vsis the speed of sound in a diatomic gas and v
0
is the rms speed of its molecule at same
temperature, which of the following is correct?
(1) vs= 0.68v
0
(2) vs= 0.5v
0
(3) vs= 0.6v
0
(4) vs= 0.75v
0
22. A horizontal wire of length Land mass M is under
tension T. If mass density (linear) of the wire follows
the relation = kX, where X is distance of point
from one end of the rod, find the time taken by wave
pulse to reach fromX= 0 toX= L.
(1) 3 2
2
ML
T(2)
2 2
3
ML
T
(3) 3
2
ML
T(4)
2
3
ML
T
23. The value of initial temperature of an ideal gas
contained in a rigid container, such that increase in
temperature by 1C results in a pressure increment
of 0.4%, is
(1) 250C
(2) 250 K
(3) 17 K
(4) 17C
24. A horizontal tube of length l closed at both ends
contains an ideal gas. The tube is rotated with
constant angular velocity , as shown in figure.
Assuming temperature to be uniform and constant
and n1and n
2be number of molecules of gas per unit
volume in the two regions as shown in figure. Which
of the following is correct?
n1
n2
(1) n1> n
2(2) n
2> n
1
(3) n1= n
2(4) Cannot be decided
25. For an enclosure maintained at 2000 K, the
maximum radiation occurs at wavelength m
. If the
temperature is raised to 3000 K, the peak will shift
to
(1) 0.5m
(2) m
(3) 2
3 m (4)
3
2 m
SECTION - II
Assertion Reason Type Questions
Directions : Questions number 26 to 30 are Assertion-
Reason type questions. Each of these questions
contains two statements. Statement-1 (Assertion) and
Statement-2 (Reason). Each of these questions also has
four alternative choices, only one of which is the correctanswer. You have to select the correct choice.
26. Statement-1 : Emissive power of a body is
dimensionless quantity.
and
Statement-2 : Absorptive power of a body is a
dimensionless quantity.
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36. 120 mL of buffer of pH 8.56 is to be prepared by
mixing 0.10 M NH4OH and 0.25 M NH
4Cl. If pK
bof
NH4OH is 4.74, calculate the volume of NH
4OH
solution required. [Use log 5 = 0.7]
(1) 50 mL
(2) 40 mL
(3) 30 mL(4) 20 mL
37. Glass is a solid solution, which is an optically
transparent fusion product of inorganic materials. The
colour of glass is due to presence of metal ions.
Then which of the following is not correct match?
Column-I Column-II
Colour of glass Metal oxide
(1) Green Fe2O3
(2) Yellow Na2O2
(3) Blue CuO
(4) Red Colloidal Au, Cu
38. Boron and silicon both have similarity due to
diagonal relationship, then which of the following is
not true for them?
(1) Both are semi-conductor
(2) As borate, silicates have tetrahedral structural
unit
(3) Both can dissolve in cold dilute acid
(4) Borides and silicides can be hydrolysed by H2O
39. Which one of the following processes can be used
for removing both types of hardnesses of water?
(1) Permutit process
(2) Washing soda process
(3) Clark's process
(4) Calgon process
40. Certain sample of water was found to contain
68 ppm of CaSO4and 19 ppm of MgCl
2. Then what
will be the total hardness of water in terms of ppm
of CaCO3?
(1) 87 ppm (2) 49 ppm
(3) 70 ppm (4) 80 ppm
41. Water (hydrane) is a type of solvent(1) Protophilic solvent (2) Protogenic solvent
(3) Amphiprotic solvent (4) All of these
42. Which is the correct increasing order of the energy
of hybrid orbital of the central atom?
(1) [PCl6]< [PCl
4]+< NH
4
+< SO2< CO
2
(2) CO2> SO
2> NH
4
+> [PCl4]+> [PCl
6]
(3) CO2< SO
2< NH
4
+< [PCl6]< [PCl
4]+
(4) CO2< SO
2< NH
4
+< [PCl4]+< [PCl
6]
43. The correct relationship among the following pairs of
given compound is
I.
O O
O O
II.
O
O
OO
III.
O
OO
O
Column-I Column-II
(I, II) (II, III)
(1) Functional isomers Metamers
(2) Metamers Functional isomers
(3) Metamers Metamers
(4) Functional isomers Functional isomers
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44. Which one is incorrect pair of degree of unsaturation
(DU) with the structure?
Column-I Column-II
Compound Degree of
unsaturation
(1) 3
(2)
H C CH CH C = CH3 2 2
CH3
4
(3) 5
(4)
CH CH CH2 32
2
45. Which of the following is most stable?
(1)
CHO
NH2
H
H
H
H
(2)
CHO
H
H
H
H
NH2
(3)
CHO
HH
NH2
H
H(4)
CHO
HH
H
H
NH2
46. How many isomeric alkynes will produce
3-chloro-3-ethylpentane in the following sequence of
reactions?
Cat aly tic P hot oche mical
Hydrogenation Chlor inat ionAlkynes
3-chloro-3-ethylpentane
(1) 4 (2) 3
(3) 2 (4) 1
47. A conjugated alkadiene having molecular formula
C13
H22
on ozonolysis gives butanone, ethanedial and
cyclohexane carbaldehyde. Which of the following is
the correct structural formula of the alkadiene?
(1) C = CH CH = CCH CH
3 2
H CH3
(2) C = CH CH = CH CH
3 2C
H C3
H
(3) C CH = CH CH2CH
3 CH
H C3
(4) CH CH = CH CH CH
3 2C
CH3
H
48. The two equilibria,
AB(aq) A (aq) B (aq)
and2AB(aq) B (aq) AB (aq)
are simultaneously maintained in a solution with
equilibrium constants K1 and K2 respectively. Theratio of concentration of A+to AB2
in the solution is
(1) Directly proportional to the concentration of B
(2) Inversely proportional to the concentration of B
(3) Directly proportional to the square of the
concentration of B
(4) Inversely proportional to the square of the
concentration of B
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(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
57. Statement-1 : Al2(SO
4)3 is used as a mordant in
textile industry.
and
Statement-2 : The process of formation of metallic
hydroxides on the fibres before dyeing is known as
mordanting.
(1) Statement-1 is True, Statement-2 is True;Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
58. Statement-1 : If the equation for a reaction is
reversed, the equilibrium constant is inverted and if
the equation is multiplied by 2, the equilibrium
constant is squared.
and
Statement-2 : The numerical value of an equilibrium
constant depends on the reaction and reaction
coefficients.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
59. Statement-1 : All strong acids in water show almost
same acidic nature.
and
Statement-2 : This is due to levelling effect of water
on account of its high dielectric constant and strong
protons accepting tendency.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
60. Statement-1 : The presence of excessive nutrients in
a lake due to inflow of nutrients from fertilizers is
called eutrophication.
and
Statement-2 : Eutrophication badly affects the
aquatic life.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
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SECTION - I
Straight Objective Type Questions
This section contains 25 multiple choice questions
numbered 61 to 85. Each question has 4 choices (1), (2),(3) and (4), out of which ONLY ONE is correct.
61. Let f: RRbe the function defined by
24 3, if 2
( )3, if 2
x x xf x
x x
Then the number of real numbers x for which
f(x) = 3 is
(1) 1 (2) 2
(3) 3 (4) 4
62. In a survey it was found that 38% people like
watching Football, 75% like watching Cricket andx%
like both. Then
(1) x= 13 (2) x= 38
(3) 13 38x (4) 13 75x
63. If 6 43 3 35
log 2 7 log 4 2log 2 2
y y
, then
the value of yis
(1) 3 (2) 2
(3) 2 (4) 4
64. If the equation z2+ (a+ ib)z+ (c+ id) = 0, where
a, b, c, dare real and bd0, has real roots, then
the value of d2 abd+ b2cis equal to
(1) 1 (2) 1
(3) 0 (4) 2
PART - C (MATHEMATICS)
65. If (x2+ x+ 2)2 (a 3)(x2+ x+ 2)(x2+ x+ 1) +
(a 4)(x2+ x+ 1)2= 0 has at least one real root,
then
(1) 0 < a< 5 (2)
195
3a
(3) 5 a< 7 (4) a7
66. In a geometric series of real numbers, the first term
is 2 and the sum of the reciprocals of its third and
fourth terms is more than its second term by 2. The
sum of all possible values for its seventh term is
(1)33
16(2)
65
32
(3)17
8(4)
1
8
67. If cos + cos = aand sin + sin = b, then
the value of cos cos equals to
(1)
2 2 2 2
2 2
( ) 4
4( )
a b a
a b(2)
2 2 2 2
2 2
( ) 4
2( )
a b b
a b
(3)
2 2 2 2
2 2 2
( ) 4
2( )
a b a
a b(4)
2 2 2 2
2 2
( ) 4
4( )
a b b
a b
68. The sum
1 1 1
sin 45 s in 46 sin 4 7 sin 48 s in 49 sin 50
1...
sin 133 sin 134
is equal to
(1) sec 1 (2) cosec 1
(3) cot 1 (4) tan 1
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69. If S= 12+ 32+ 52+ ... + 992, then the value of the
sum 22+ 42+ 62+ ... + 1002 is
(1) S+ 2550 (2) 2S
(3) 4S (4) S+ 5050
70. The constant term in the quadratic expression
1
1 1
1
n
k
x xk k
as n is
(1) 1 (2) 1
(3) 0 (4)1
2
71. The equation (x 1)(x 2)(x 3) = 24 has the real
root equal to aand the complex roots band c. Then
the value ofbc
ais
(1)1
5(2)
1
5
(3)6
5(4)
6
5
72. If10
1025log
1024p
and log
102 = q, then the value of
log10
(4100) in terms of pand qis equal to
(1) p+ 9q (2) p+ 10q
(3) 12p+ q (4) p+ 12q
73. The sum of the infinite series
1 1 1 1 1...
9 18 30 45 63 is
(1)1
3(2)
1
4
(3)1
5(4)
2
3
74. The graphs of y= sin x, y= cos x, y= tan xand
y= cosec xare drawn on the same axes from 0 to
2
. A vertical line is drawn through the point where
the graphs of y = cos x and y = tan x cross,
intersecting the other two graphs at points Aand B.
The length of the line segment ABis
(1) 1 (2) 5 12
(3) 2 (4) 5 1
2
75. Let A(5, 12), B(13 cos , 13 sin ) and C(13 sin ,
13 cos ), where is real, be the vertices of a
ABC. Then, the orthocentre of ABC lies on the
line
(1) x y 7 = 0 (2) x+ y 7 = 0
(3) x y+ 7 = 0 (4) x+ y+ 7 = 0
76. The line 3x + 2y 24 = 0 meets x-axis at A and
y-axis at B. The perpendicular bisector of ABmeets
the line through (0, 1) parallel to x-axis at C. Then,
the area of the ABCis
(1) 91 sq. unit (2) 12 sq. unit
(3) 36 sq. unit (4) 48 sq. unit
77. If the line xcos + ysin = 2 is the equation of a
transverse common tangent to the circles
x2+ y2= 4 and 2 2 6 3 6 20 0x y x y , then
the value of is
(1)3
(2)
6
(3)2
3
(4)
5
6
78. Two circles with centres at A(2, 3) and B(5, 6) and
having equal radii are intersecting orthogonally. Then,
the radius of the circles is
(1) 3 2 (2) 2 2
(3) 3 (4) 2
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87. Statement-1 : A chord y = mx + c of the curve
3x2 y2 2x+ 4y = 0, which passes through the
point (1, 2), subtend a right angle at the origin.
and
Statement-2 : Lines represented by the equation
(3c + 2m)x2 2(1 + 2m)xy + (4 c)y2 = 0 are
perpendicular if c+ m+ 2 = 0.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
88. Statement-1 : The real roots of the equation
x4 3x3 2x2 3x+ 1 = 0 lie in the interval [0, 4].
and
Statement-2 : The real roots of the equation are
reciprocal to each other.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
89. Statement-1 : If a, b, c, d R+and (a+ b + c +
d+ 3)5= 9375abcd, then a+ b+ c+ d= 12.
and
Statement-2 : If for positive real numbers AM = GM,
then numbers are equal.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation forStatement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
90. Statement-1 : The minimum distance between the
parabola y2= 4xand the circle x2+ y2 54y+ 704
= 0 is 522 .
and
Statement-2 : Shortest distance between these two
curves occurs along the common normal.
(1) Statement-1 is True, Statement-2 is True;
Statement-2 is a correct explanation for
Statement-1
(2) Statement-1 is True, Statement-2 is True;
Statement-2 is NOT a correct explanation for
Statement-1
(3) Statement-1 is True, Statement-2 is False
(4) Statement-1 is False, Statement-2 is True
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Test Booklet Code
Test No. 7
JEE (Main)-2015
for
SHAK TA EA STAI
SD E
N RI IEL
L SA
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8/10/2019 JEE Main 2014_Test 8 (Paper I) Code A
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Test - 7 (Answers & Hints) All India Aakash Test Series for JEE (Main)-2015
1/9
ANSWERS
1. (1)
2. (3)
3. (1)
4. (2)
5. (1)
6. (3)
7. (2)
8. (3)
9. (3)
10. (2)
11. (2)
12. (3)
13. (1)
14. (4)
15. (2)
16. (2)
17. (2)
18. (3)
19. (2)
20. (2)
21. (1)
22. (4)
23. (3)
24. (1)
25. (3)
26. (2)
27. (1)
28. (1)
29. (4)
30. (2)
PHYSICS CHEMISTRY MATHEMATICS
31. (3)
32. (3)
33. (3)
34. (3)
35. (4)
36. (2)
37. (1)
38. (3)
39. (2)
40. (2)
41. (1)
42. (3)
43. (3)
44. (3)
45. (2)
46. (1)
47. (1)
48. (3)
49. (3)
50. (4)
51. (1)
52. (1)
53. (4)
54. (4)
55. (3)
56. (2)
57. (2)
58. (2)
59. (3)
60. (4)
61. (2)
62. (4)
63. (1)
64. (3)
65. (3)
66. (4)
67. (3)
68. (2)
69. (4)
70. (4)
71. (1)
72. (3)
73. (1)
74. (4)
75. (2)
76. (3)
77. (3)
78. (4)
79. (1)
80. (3)
81. (4)
82. (2)
83. (1)
84. (3)
85. (2)
86. (4)
87. (1)
88. (4)
89. (1)
90. (3)
TEST - 7