Sri Chaitanya Educational Institutions: Kcet Grand Test-7
Sri Chaitanya Educational Institutions: Kcet Grand Test-7
Sri Chaitanya Educational Institutions: Kcet Grand Test-7
3. Please note that even a minute unintended ink dot on the OMR answer sheet will also be
recognized and recorded by the scanner. Therefore, avoid multiple marking of any kind
on the OMR answer sheet.
4. Hand over the OMR answer sheet to the room invigilator as it is.
Sri Chaitanya
MATHEMATICS
1. n A 12, n B 16, n C 21, n A B 5, n A C 8, n B C 12, n A B C 3, then
nA B C =
1) 59 2) 31 3) 34 4) 27
2. R is a relation on N given by R = {(x,y)| 4x +3y=20} which of the following belongs to
R?
1) (5,0) 2) (-4,12) 3) (2,4) 4) (3,4)
tan 80 tan10
3.
tan 70
1) 0 2) 1 3) 2 4)3
cosA cos B sinA sin B
n n
A B A B A B
1) 0 2) 2 cot n 3) 2 cot n 4) 2 tan n
2 2 2
5 13 23 ... k 3
5.
k 1 1 3 5 .... (2 k 1)
1) 1 2) 4 3) 2 4) 2
7. If and are the roots of x 2 ax b2 0, then 2 2 is equal to
1) a 2 2b 2 2) 2a 2 b 2 3) a 2 b 2 4) a 2 b 2
3 x 2 5 2 x
8. The solution of is
5 3
1) , 2 2) , 2 3) 2, 4) 2,
9. How many different words can be formed by jumbling the letters in the word
MISSISSIPPI in which no two S are adjacent?
1) 6 7 8 C 4 2) 6 8 7 C 4 3) 7 6 C4 8 C4 4) 8 6 C4 7 C4
5
C4
47 52 j
10. C3
j 1
1) 52 C4 2) 52 C3 3) 53 C4 4) 53 C3
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Sri Chaitanya
11. The number of terms in the expansion of ( x y z )10 is
1) 11 2) 33 3) 66 4)132
a n1 b n1
12. If the harmonic mean between a and b is , then n=
an bn
1
1) 0 2) -1 3) 4)1
2
13. The area enclosed with in the curve |x|+|y|= 1 is
1
1) 2 2) 3) 1 4) 4
2
14. The circle x 2 y 2 8 x 4 y 4 0 touches
1) x-axis 2) y-axis
3) both axes 4) neither x-axis nor y-axis
15. The length of the latus rectum of 4x 2 + 9 y 2 + 8x + 36y + 4 = 0 is
8 4 1
1) 2) 3) 9 4)
3 3 2
16. If the distance between the points (3 ,4 -2) and (1 , 1, k) is 7 then k =
1) -4 or 8 2) 4 or -8 3) -4 or -8 4) 4 or 8
1 x 2 1 x x 2
17. lim =
x 0 3x 1
1 1
1) log 9 2) 3) log 3 4)
log 9 log 3
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Sri Chaitanya
ab
23. If * is defined on R* as a*b = then the identity element in the group R* ,* is, where
2
R* is set of all positive really numbers.
1 1
1) 1 2) 2 3) 4)
2 3
1) 5 2) 10 3) 15 4) 20
3 4
25. If Sin1 Sin1 then a value of x is
x x 2
1) 3 2) 5 3) 7 4) 11
cos sin
26. If A then A n
sin cos
n cos n sin
3) 4) None
n sin n n cos
1) -4 2) -3 3) -2 4) -1
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Sri Chaitanya
1 dy
32. If y x 2 , then
1 dx
x2 2
x ...
2 xy 2 2 xy 2x 2
1) 2) 3) 4)
y 2 1 y 2 1 y 1
2
y 1
2
f ( x) 3
33. If f (9) 9, f 1 (9) 4 , then lim
x9 x 3
1) 9 2) 3 3) 4 4) 27
34. The maximum value of x x is
1) ee 2) ee 3) e1/ e 4) e1/ e
35. The tangent to the curve y e2 x at the point (0,1) meets x -axis at
1
1) (0.1) 2) , 0 3) (2, 0) 4) (0, 2)
2
1
1) x e 2) x 3) x 1 4) x e
e
e (1 cot x cot x ) dx
x 2
37.
1) e x cot x c 2) e x cot x c 3) e x cos ec x c 4) e x cos ec x c
sin 8 x cox8 x
38. dx
1 2sin 2 x cos 2 x
1 1
1) sin 2 x C 2) sin 2 x C
2 2
1
3) sin 2 x C 4) sin 2 x C
2
dx
39. f ( x) c f ( x)
x 100 x 99
1) 2( x 100)1/ 2 2) 3( x 100)1/ 2
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Sri Chaitanya
/2
41. sin | x | dx
/ 2
1) 0 2) 1 3) 2 4)
/2 2 sin x
42. log dx
/ 2 2 sin x
1) log 2 2) log 2 3) log 2 4) 0
2 2
43. The area cut off by the parabola y 2 4 ax and its latus rectum is
8a 2 4a 2
1) 8a 2 2) 4a 2 3) 4)
3 3
44. The area bounded by the curve y x x , x axis and the ordinates x 1 and x 1 is
2 1 4
1) 0 2) 3) 4)
3 3 3
dy 2
5/ 3
d2y
45. The degree of the differential equation 5 7 is
dx dx 2
1) 3 2) 2 3) 1 4) 4
dy
46. y x2 has the solution
dx
1) y x 2 2 x 2 ce x 2) y x 2 x 2 2 ce x
3) y x x 2 2 ce2 x 4) y 2 x x 2 2 ce x
47. The solution of the differential equation ydx ( x x 2 y )dy 0
1
1) c 2) log y cx
xy
1 1
3) log y c 4) log y c
xy xy
1) 2) 3) 4)
2 3 4
52. If A(3, 4,5), B (4, 6,3), C (1, 2, 4), D(1, 0,5) then the projection of AB on CD is
3 4 4
1) 0 2) 3) 4)
4 3 3
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KCET GRAND TEST-7 PHYSICS Date: 15-06-2022
61. The value of electric potential at any point due to any electric dipole is
1) k . p r 2) k . p r 3) k . p.r 4) k . p.r
r2 r3 r2 r3
62. If K is dielectric constant and X is dielectric strength of a dielectric, then the
material suitable for use as a dielectric in a capacitor must have :
1) High K, Low X 2) High K, High X
3) Low K, Low X 4) Low K, High X
63. A charge q is placed at the centre of the open end of cylindrical vessel. The flux of
the electric field through the surface of the vessel is
1) zero 2) q 3) q 4) 2q
0 2 0 0
64. An infinite parallel thin plane sheet of a metal is charged to charge density
columb per square metre in a medium of dielectric constant K. Intensity of electric
field near the metallic surface will be
1) E 2) E K 3) E 4) E K
0 K 2 0 2 0 K 2 0
65. A wire of radius r has resistance R. If it is stretched to the wire of r/2 radius, then
the resistance becomes
1) 2R 2) 4 R 3) 16 R 4) zero
66. A potentiometer wire is 100 cm long and a constant potential difference is
maintained across it. Two cells are connected in series first to support one another
and then in opposite direction. The balance points are obtained at 50 cm and 10 cm
from the positive end of the wire in the two cases. The ratio of e.m.f.'s is
1) 5:1 2) 5:4 3) 3:4 4) 3:2
67. A proton is moving in a uniform magnetic field B in a circular path of radius a in a
direction perpendicular to z-axis along which field B exists. Calculate the angular
momentum, if the radius is a and charge on proton is e.
1) Be / a 2 2) eB 2 a 3) a 2 eB 4) aeB
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68. A galvanometer of resistance, G is shunted by a resistance S ohm. To keep the
main current in the circuit unchanged, the resistance to be put in series with the
galvanometer is
2
1) G2 2) SG 3) S 4) G
S G S G S G S G
69. If magnetic lines of force are drawn by keeping magnet vertical. then number of
neutral points will be
1) One 2) Two 3) Four 4) Five
70. What is the coefficient of mutual inductance when the magnetic flux changes by
2 x 10-2 Wb and change in current is 0.01 A
1) 10 V 2) 20 V 3) 20 2V 4) 10 V
2 2
73. A fully charged capacitor C with initial charge q0 is connected to a coil of self
inductance L at t = 0. The time at which the energy is stored equally between the
electric and the magnetic field is
1) LC 2) 2 LC 3) LC 4) LC
4
74. Electromagnetic waves consists of periodically oscillating electric and magnetic
vectors
1) in mutually perpendicular planes but vibrating with a phase difference of
2) in mutually perpendicular planes but vibrating with a phase difference of / 2
3) in randomly oriented planes but vibrating in phase
4) in mutually perpendicular planes but vibrating with same phase
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75. A microscope is focused on a mark on a piece of paper and then a glass slab of
thickness 3cm and refractive index 1.5 is placed on the marks. How much the
microscope be move to get the mark in focus again
1) 1cm downwards 2) 2cm upward
3) 1cm upward 4) 2cm downward
76. Two thin lenses of focal lengths f1and f2 are in contact and coaxial. The power of
combination is
1) f1 f 2 2) f1 3) f2 4) f1 f 2
f1 f 2 f2 f1 2
77. A wavefront is represented by the plane y = 3 - x. The propagation of wave takes
place at
1) 45° with x direction 2) 135° with x direction
3) 60° with x direction 4) cannot say
78. At two points P and Q on screen in Young's double slit experiment, waves from
slits S1 and S 2 have a path difference of 0 and and respectively. The ratio of
4
intensities at P and Q will be
1) 3:2 2) 2:1 3) 2:3 4) 4:1
79. Specific charge is least for
1) -particle 2) proton
3) positron 4) tritium
80. If K1 , K 2 and K3 are the respective kinetic energies of an electron, a proton and an
alpha particle, each having the same de-Broglie wavelength, then
1) K1 K 2 K 3 2) K3 K 2 K1
3) K1 K3 K2 4) K1 K 2 K3
81. The distance of closest approach of an a particle fired towards a nucleus with
momentum p is r. If the momentum of a particle is 2 p, the corresponding distance
of closest approach will be
1) r/2 2) 2r 3) r 4) r/8
4
82. The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the
hydrogen atom, is
1) 2:-1 2) 1:-1 3) 1:1 4) 1:2
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83. If an electron and positron annihilates, then energy released
1) 3.2 x 10-13 J 2) 1.6x10-13 J 3) 4.8 x 10-13 J 4) 6.4 x 10-13 J
84. 90% of the active nuclei present in a radioactive sample are found to remain
undecayed after 1 day. The percentage of undecayed nuclei left after two days will
be
1) 85% 2) 81% 3) 80% 4) 79%
85. In semiconductor at a room temperature
1) the valence band is partially empty and the conduction band is partially filled
2) the valence band is completely filled and the conduction band is partially filled
3) the valence band is completely filled
4) the conduction band is completely empty
86. The dimensions of mobility are
1) M 1 L0T 2 A1 2) M 1L0T 2 A1 3) M 0 LT
1 2 1
A 4) M 0 L1T 2 A1
87. A particle is moving with a constant speed v in a circle. What is the magnitude of
the average velocity after half revolution ?
1) 2v 2) 2v / 3) v / 2 4) v / 2
88. A particle is projected at 60° to the horizontal with an energy E. The kinetic energy
and potential energy at the highest point are
The coefficient of friction between the tyres of the car and the road is s . The
maximum safe velocity on this road is
1) s tan 2) s tan
gR 2 gR
1 s tan 1 s tan
3) g s tan 4) g s tan
R 1 s tan R 2 1 s tan
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91. A body of mass 4 kg moving with velocity 12 m/s collides with another body of
mass 6 kg at rest. If two bodies stick together after collision, then the loss of K.E.
after collision is
1) zero 2) 144 J 3) 172.8 J 4) 288 J
92. A square plate of side l has mass M. What is its moment of inertia about one of its
diagonals ?
2 2 2 2
1) Ml 2) Ml 3) Ml 4) Ml
6 12 3 4
93. If A is the areal velocity of a planet of mass M, its angular momentum is :
2 2
1) M/A 2) 2MA 3) A M 4) AM
94. In designing a beam for its use to support a load, the depression at centre is
proportional to (where, Y is Young's modulus)
1) Y 2 2) Y 3) 1 4) 1
Y Y2
95. A hole is made at the bottom of a tank filled with water (density 103 kg / m3 ). If the
total pressure at the bottom of the tank is three atmosphere (1 atmosphere
1) 1 2) 1 3) 1 4) 1
2 2 2 1 3
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99. A transverse wave of amplitude 0.5 m and wavelength 1 m and frequency 2 Hz is
propagating in a string in the negative x direction. The expression for this wave is
1) y(x, t) = 0.5 sin(2 x - 4 t) 2) y(x, t) = 0.5 cos(2 x+4 t)
3) y(x, t) = 0.5 sin( x-2 t) 4) y(x, t) = 0.5 cos(2 x-2 t)
100. The wavelength of a spectral line for a given element in light received from a
distant star is increased by 0.32%. Velocity of the star is
1) 9.6 x 105 m/s away from the earth
2) 9.6 x 105 m/s towards earth
3) 9.6 x 10 4 m/s receding from the earth
4) 9.6 x 10 4 m/s away from the earth
101. A passenger in an aeroplane shall :
1) never see a rainbow
2) may see a primary and a secondary rainbow as concentric circles
3) may see a primary and a secondary rainbow as concentric arcs
4) never see a secondary rainbow
102. Consider a ray of light incident from air onto a slab of glass (refractive index u) of
width d, at an angle . The phase difference between the ray reflected by the top
surface of the glass and the bottom surface is :
1/2 1/2
1) 4d 1 1 sin 2 2) 4d 1 1 sin 2
2 2
1/2 1/2
3) 4 d 1 1 sin 2 4) 4 d 1 1 sin 2 2
2
2 2
103. A particle is dropped from a height H. The de Broglie wavelength of the particle as
a function of height is proportional to :
1) H 2) H 1/2 3) H 0 4) H 1/2
104. The simple Bohr model cannot be directly applied to calculate the energy levels of
an atom with many electrons. This is because :
1) of the electrons not being subject to a central force
2) of the electrons colliding with each other
3) of screening effects
4) the force between the nucleus and an electron will no longer be given by
coulomb's law
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105. Heavy stable nuclei have more neutrons than protons. This is because of the fact
that:
1) neutrons are heavier than protons
2) electrostatic forces between protons are repulsive
3) neutrons decay into protons through beta decay
4) nuclear forces between neutrons are weaker than that between protons
106. Hole is :
1) an antiparticle of electron
2) a vacancy created when an electron leaves a covalent bond
3) absence of free electrons
4) an artificially created particle
107. The output of an OR gate is connected to both the inputs of a NAND gate. The
combination will serve as a :
1) NOR gate 2) AND gate 3) OR gate 4) NOT gate
108. A male voice after modulation-transmission sounds like that of a female to the
receiver. The problem is due to:
1) poor selection of modulation index (selected 0< m< 1)
2) poor bandwidth selection of amplifiers
3) poor selection of carrier frequency
4) loss of energy in transmission
109. Two amplifiers are connected one after the other in series (cascaded). The first
amplifiers has a voltage gain of 10 and the second has a voltage gain of 20. If the
input signal is 0.01V, the output signal is
1) 0.1V 2) 0.3V 3) 1V 4) 2V
110. Which of the following measurements is most precise?
1) 5.00 mm 2)5.00 cm 3) 5.00 m 4) 5.00 km
111. The displacement of a particle is given by x= (t-2)2 , where x is in meteres and t in
seconds.The distance covered by the particle in first 4 seconds is.
1) 4m 2) 8m 3)12m 4)16m
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112. A body of mass 2 Kg travels according to the law x(t)=pt+ qt2 + rt3 ,where p=3m/s,
q=4m/s 2 and r=5 m/s 3 the force acting on the body at t= 2seconds is:
1)136 N 2)134N 3)158N 4)68N
113. A body of mass 0.5 Kg travels in a straight line With velocity v=a x3/2 ,Where a=5
m-1/2 s-1 .The work done by the net force during its displacement from x=0 to x=2
m is :
1)1.5 J 2)50 J 3)10 J 4)100 J
114. The net external torque on a system of particles about an axis is zero. Which of the
following is (are) compatible with it?
1) The forces may be acting on the axis of rotation.
2) The forces may be acting parallel to the axis of rotation.
3) The torque caused by some forces may be equal and opposite to that caused by
other forces.
4) All options are correct
115. To point charges are 3 m apart and their combined charge is 8C . The force of
repulsion between them is 0.012N the charges are
1) 4 C , 4C 2) 6 C , 2C 3) 5C ,3C 4) 7 C ,1C
116. The equivalent resistance of network of three resistors each 2 cannot be
1) 0.67 2) 2 3) 3 4) 6
117. Five cells each of e.m.f E and internal resistance ‘r’ send the same amount of
current through an external resistance R whether the cells are connected in parallel
or in series .then the ratio (R/r) is
1)2 2)½ 3)1/5` 4)1
118. Inside a cyclotron a moving charged particle will gain energy due to the
application of
1) Electric field 2) magnetic field
3) Both of then 4) none of them
119. An air core solenoid has 1000 turns and is one metre long. Its cross-sectional area
is 10 cm2. Its self-inductance is
1) 0.1256 mH 2) 12.56 mH 3)1.256 mH 4)125.6 m
120. If l1 and l2 be the size of the images respectively for the two positions of lens in the
displacement method, then the size of the object is given by
1) l1l2 2) l1 x l2 3) 4)
Sri Chaitanya
KCET GRAND TEST-7 CHEMISTRY Date: 15-06-2022
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Sri Chaitanya
129. At constant volume and temperature conditions, the rate of diffusion DA and DB of gases
A and B having densities A and B are related by the expression.
1/2 1/2
1) DA DB A 2) DA DB B
B A
1/2 1/2
3) DA DB A 4) DA DB B
B A
130. If Z is a compressibility factor, van der walls equation at low pressure can be written as:
RT a
1) Z 1 2) Z 1
Pb VRT
Pb Pb
3) Z 1 4) Z 1
RT RT
131. From the following bond energies : H – H bond energy : 431.37 kJ mol 1
C = C bond energy : 606.10 kJ mol 1 C – C bond energy : 336.49 kJ mol 1
C – H bond energy : 410.50 kJ mol 1 Enthalpy for the reaction,
H H H H
C = C + H- H H-C - C - H
H H H H
Will be
1) 243.6 kJ mol 1 2) 120.0 kJ mol 1
3) 553.0 kJ mol 1 4) 1523.6 kJ mol 1
132. The S of the following substance are : CH 4 g 186.2 JK 1mol 1
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134. Oxidation state of sulphur in anions SO32 , S 2O42 and S2 O62 increases in the order :
1) S 2O62 S2O42 SO32 2) SO32 S2O42 S2 O62
3) S 2O42 SO32 S 2 O62 4) S 2O42 S 2O62 SO32
135. Which statement is wrong?
1) Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen
2) In ortho hydrogen spin of two nuclei is in same direction
3) Ortho and para forms do not resemble in their chemical properties
4) In para hydrogen spin of two nuclei is in opposite direction.
136. Which is not correctly matched?
1) Basic strength Cs2O Rb2O K 2O Na2O Li2O of oxides
2) Stability of Na2 O2 K 2O2 Rb2O2 CaO2 peroxides
CH3 C CCH3
3) 4) CH 4
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Sri Chaitanya
142. Doping of AgCl crystals with CdCl2 results in
1) Frenkel defect 2) Schottky defect
3) Substitutional cation vacancy 4) Formation of F – centres
143. The pyknometric density of sodium chloride crystal is 2.165 103 kg m 3 while its X – ray
density is 2.178 103 kg m3 . The fraction of unoccupied sites in sodium chloride crystal is
1) 5.96 103 2) 5.96 10 4 3) 5.96 102 4) 5.96 101
144. The vapour pressure of a solution of the liquids A p 80 mm Hg and x A 0.4 and
B p 120 mm Hg and xB 0.6 is found to be 100 mm Hg. It shows that the solution
exhibits
1) positive deviation from ideal behavior
2) negative deviation from ideal behavior
3) ideal behavior
4) positive deviation for lower conc. and negative for higher conc.
145. We have three aqueous solutions of NaCl labelled as ' A ' , ' B ' and ' C ' with
concentrations 0.1 M, 0.01 M and 0.001, respectively. The value of van’t Hoff factor for
these solutions will be in the order _____
1) iA iB iC 2) iA iB iC 3) iA iB iC 4) iA iB iC
146. If denotes reduction potential, then which is true?
1) E cell right left 2) E cell left right
147. An electrolytic cell contains a solution of Ag 2 SO4 and has platinum electrodes. A current
is passed until 1.6 gm of O2 has been liberated at anode. The amount of silver deposited
at cathode would be
1) 107.88gm 2) 1.6gm 3) 0.8gm 4) 21.60gm
148. The rate expression for the reaction A g B g C g is rate kC A2CB1/2 . What changes
in the initial concentrations of A and B will cause the rate of reaction to increase by a
factor of eight ?
1) CA 2; CB 2 2) CA 2; CB 4 3) CA 1; CB 4 4) CA 4; CB 1
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149. Select the rate law that corresponds to data shown for the following reaction
A B products.
2000 1000
1) 1000K 2) K 3) 2000K 4) K
2.303 2.303
151. The cause of Brownian movement is
1) Heat changes in liquid state
2) Convectional currents
3) The impact of molecules of the dispersion medium on the colloidal particles.
4) Attractive forces between the colloidal particles and molecules of dispersion medium.
152. Which of the following will show Tyndall effect?
1) Aqueous solution of soap below critical micelle concentration.
2) Aqueous solution of soap above critical micelle concentration.
3) Aqueous solution of sodium chloride.
4) Aqueous solution of sugar.
153. Which of the following reactions is an example for calcination process?
1) 2 Ag 2HCl O 2 AgCl H 2O 2) 2Zn O2 2ZnO
following is correct ?
1) 2x y 2) x y 3) x y 4) x y T S
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155. In a cyclotrimetaphosphoric acid molecule, how many single and double bonds are
present ?
1) 3 double bonds; 9 single bonds 2) 6 double bonds; 6 single bonds
3) 3 double bonds; 12 single bonds 4) Zero double bonds; 12 single bonds
156. Caro’s acid is
1) H 2 SO3 2) H 3 S 2O5 3) H 2 SO5 4) H 2 S 2O8
157. Oxidation of thiosulphate by iodine gives
1) Tetrathionate ion 2) sulphide ion
3) sulphate ion 4) sulphite ion
158. n 1 d 10 ns 2 is the general electronic configuration of
161. Which of the following are inner orbital complex ( i.e., involving d 2 sp 3 hybridization)
and is paramagnetic in nature?
3 3 3
1) Mn CN 6 , Fe CN 6 , Co C2O4 3
3 3 3
2) MnCl6 , FeF6 , CoF6
3
3) Mn CN 6 , Fe(CN )6 3 ,
3 3 3
4) MnCl6 , Fe(CN )6 , Co C2 O4 3
162. A solution containing 2.675g of CoCl3 . 6 NH 3 ( molar mass 267.5g mol 1 ) is passed
through a cation exchanger. The chloride ions obtained in solution were treated with
excess of AgNO3 to give 4.78 g of AgCl ( molar mass 143.5 g mol 1 ). The formula of the
complex is
1) Co NH 3 6 Cl3 2) CoCl NH 3 4 Cl
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Sri Chaitanya
173. All three amines 1 , 2 ,3 react with
1) H 2O 2) R X 3) HCl 4) CH 3CO 2 O
1) 1,2 2) 4 only 3) 1, 2, 4 4) 1, 2, 3
174. Which of the following reactions will not give a primary amine?
Br / KOH LiAlH
1) CH 3CONH 2 2
2) CH 3CN 4
LiAlH LiAlH
3) CH 3 NC 4
4) CH 3CONH 2
4
175. The change in the optical rotation ( with time) of freshly prepared solution is known as
1) Specific rotation 2) Inversion
3) Rotatory motion 4) Mutarotation
176. Amino acids generally exist in the form of Zwitter ions.This means they contain
1) basic - NH 2 group and acidic - COOH group
2) the basic - NH 3 group and acidic - COO group
177. The half life period for catalytic decomposition of AB3 at 50 mm Hg is 4hrs and at 100
mm Hg it is 2 hrs. The order of reaction is
1) 1 2) 3 3) 2 4) 0
n m
178. The rate law for a reaction between the substance A and B is given by Rate A B
on doubling the concentration of A and halving the concentration of B, the ratio of the
new rate to the earlier rate of the reaction will be as
1
1) (m+n) 2) (n-m) 3) 2 n m 4) n m
2
179. The major organic compound formed by the reaction of 1, 1, 1 – trichloroethane with
silver powder is :
1) Acetylene 2) Ethene 3) 2 – Butyne 4) 2 – Butene
180. Heating mixture of sodium benzoate and soda – lime gives
1) benzene 2) methane
3) sodium phenoxide 4) calcium benzoate
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