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Date - 2017-04-24 ( Shift - 1 )

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(1) The unit of impulse is the same as that of:

(a) Moment of force
(b) Linear momentum
(c) Rate of change of linear momentum
(d) Force
(Ans) Linear momentum

(2) Ther rocket works on the principle of

(a) Conservation of energy
(b) Conservation of mass
(c) Conservation of linear momentum
(d) Conservation of angular momentum
(Ans) Conservation of linear momentum

(3) The angular momentum of a body is conserved, if the acting:

(a) Force is zero
(b) Torque is zero
(c) Force is constant
(d) Torque is constant
(Ans) Torque is zero

(4) The partical value poission ratio is possible:

(a) 0.4
(b) ­5
(c) Greater than 0.5
(d) Zero
(Ans) 0.4

(5) The unit of surface energy is:

(a) Joule
(b) Joule/meter ²
(c) Newton
(d) Newton­meter²
(Ans) Joule/meter ²

(6) The 52 0F temperature equivalence in 0C is

(a) 11.11 oC
(b) 13.16 oc
(c) 52 o C
(d) 0 o C
(Ans) 11.11 oC

(7) In steady state the temperature of cross section area of a rod, changes with time:

(a) Decreased
(b) Increased
(c) Remain same
(d) Firstly decreased then increased
(Ans) Remain same

(8) In simple harmonic motion total energy of a particle is proportional to:

(a) Frequency of oscillation
(b) Maximum velocity speed
(c) Amplitude
(d) Square of amplitudes
(Ans) Square of amplitudes

(9) Medium in progressive wave

(a) Different particle have different phase
(b) All particle have same phase
(c) All particle vibrates in differently at any time
(d) Particle not transferred energy
(Ans) Different particle have different phase

(10) The wave equation of wave is y = (100t ­ x) where y and x is in cm and t is in second. The wavelength of wave is:

(a) 2 cm
(b) 3 cm
(c) 5 cm
(d) 100 cm
(Ans) 2 cm

(11) The angle of a prism is 5o and its refractive indices for red and violet colours are 1.5 and 1.6 respectively. The angular dispersion produced by the prism is

(a) 7.75 ⁰
(b) 5 ⁰
(c) 0.5⁰
(d) 0.17⁰
(Ans) 0.5⁰

(12) The wavelength of visible light are between:

(a) 3000 μm to 0.4 μm
(b) 0.4 μm to 0.7 μm
(c) 0.7 μm to 1000 μm
(d) 0.1 cm to 30 cm
(Ans) 0.4 μm to 0.7 μm

(13) The wavelength of visible light are between:

(a) 3000 μm to 0.4 μm
(b) 0.4 μm to 0.7 μm
(c) 0.7 μm to 1000 μm
(d) 0.1 cm to 30 cm
(Ans) 0.4 μm to 0.7 μm

(14) In Young’s experiment if the light is not perfectly monochromatic then:

(a) Intensity of centre fringe reduced
(b) Brightness of bright fringes reduced
(c) Dark fringe is not more dark
(d) None of these
(Ans) Brightness of bright fringes reduced

(15) The image formed by concave mirror may not be find on screen while object:

(a) Placed between pole and focus
(b) Placed between focus and radius of curvature
(c) Placed between centre and infinite
(d) Placed on radius of curvature
(Ans) Placed between pole and focus

(16) Images formed by a convex spherical mirror is

(a) Virtual
(b) Real
(c) Enlarged
(d) Inverted
(Ans) Virtual

(17) In visible light the photon energy associated with maximum wavelength will be

(a) 1 eV
(b) 1.6 eV
(c) 3.1 eV
(d) 7 eV
(Ans) 1.6 eV

(18) A galvanometer is converted into an ammeter when we connect a:

(a) High resistance in series
(b) High resistance in parallel
(c) Low resistance in series
(d) Low resistance in parallel
(Ans) Low resistance in parallel

(19) The resistively of a wire:

(a) Varies with its length
(b) Varies with its cross section
(c) Varies with its mass
(d) Does not depend on its length, cross section and mass/
(Ans) Does not depend on its length, cross section and mass/

(20) The unit of magnetic field is:

(a) Newton
(b) Newton­meter
(c) Newton­meter 2
(d) Newton/amp­meter/
(Ans) Newton/amp­meter/

(21) Electrical conductivity of semiconductor:

(a) Decrease with increased in temperature
(b) Increased with increase in temperature
(c) No change with increase in temperature
(d) Firstly increase then decrease with increase in temperature
(Ans) Increased with increase in temperature

(22) The electric intensity at a point 20cm away from a charge of ²× 10 ­⁵C is

(a) 4.5 × 10 ⁶ N/C
(b) 3.5 × 10 ⁵N/C
(c) 3.5 × 10 ⁶N/C
(d) 4.5 × 10 ⁵N/C
(Ans) 4.5 × 10 ⁶ N/C

(23) A sheet of aluminium foil of negligible thickness is introduced between the plates of capacitor. The capacitance of the capacitor

(a) Remains unchanged
(b) Becomes infinite
(c) Increase
(d) Decreases
(Ans) Remains unchanged

(24) The resistances of a material increases with temperature. It is:

(a) Metal
(b) Insulator
(c) Semiconductor
(d) Semi metal
(Ans) Metal

(25) The resistance of conductor is 5 ohm at 50oC and 6 ohm at 100oC. Its resistance at 0oC is:

(a) 1 ohm
(b) 2 ohm
(c) 3 ohm
(d) 4 ohm
(Ans) 4 ohm

(26) If the current in an bulb drops by 1% the power decreased by

(a) 1%
(b) 2%
(c) 4%
(d) 0.5%
(Ans) 2%

(27) If the current in an bulb drops by 1% the power decreased by

(a) 1%
(b) 2%
(c) 4%
(d) 0.5%
(Ans) 2%

(28) Approximately how many calories of heat will be genertaed in a 210 W electric bulb in 5 minutes:

(a) 15000
(b) 1050
(c) 63000
(d) 80000
(Ans) 15000

(29) Magnetic lines of force:

(a) Always intersect
(b) Are always closed
(c) Tends to crowd far away from the poles of magnet
(d) Do not pass through vacuum
(Ans) Are always closed

(30) If a current is passed in a spring it:

(a) Get compressed
(b) Get expanded
(c) Oscillates
(d) Remain unchanged
(Ans) Get compressed

(31) Powerful permanent magnet will be made by

(a) Cobalt
(b) Tin coal
(c) Cobalt steel
(d) Aluminium
(Ans) Tin coal

(32) Magnetic susceptibility for water is:

(a) Zero
(b) Small positive number
(c) Small negative number
(d) Big negative number
(Ans) Small negative number

(33) Lenz’s law is conservation of following:

(a) Impulse
(b) Momentum
(c) Mass
(d) Energy
(Ans) Energy

(34) coil has inductance 100 and current passes from it change by 1A in 0.1sec. The emf induced in the coil is:

(a) 1 mV
(b) 1 V
(c) 10 mV
(d) 0.1 mV
(Ans) 1 mV

(35) The angle of the prism is 30o. The rays incident at 60o at one refracting face and produce a deviation of 30o. The angle of emergence is:

(a) 0⁰
(b) 30⁰
(c) 60⁰
(d) 90⁰
(Ans) 0⁰

(36) A raindrop of radius r falls from a certain height ‘h’ above the ground. The work done by the gravitational force is proportional to:

(a) r
(b)
(c) r ³
(d) r⁴
(Ans) r ³

(37) In two dimensional motion the path of object moving with uniform velocity is:

(a) Zig ­ zag
(b) Circular
(c) Parabolic
(d) Straight line
(Ans) Straight line

(38) Which is the correct order of Hydrolysis

(a) NF3 > NCl3 > NBr3 > NI3
(b) BiF3 > BiCl3 > BiBr3 > BiI3
(c) NCl3 < PCl3 < AsBr3 < SbCl3
(d) SiX4 > GeX4 > SnX4 > CX4
(Ans) SiX4 > GeX4 > SnX4 > CX4

(39) Which of the following order of ionization energy is not correct:

(a) Li+ > He
(b) H > Cl
(c) F > Xe
(d) O > O2
(Ans) O > O2

(40) Correct order of allotropism is

(a) Si > C > Sn
(b) N > P > As
(c) C > Si > Ge
(d) None of these
(Ans) C > Si > Ge

(41) Which is not correct statement about aniline?

(a) Aniline gives litmus test
(b) It can be steam distillated
(c) It is primary amine
(d) It is more basic than acetanilide
(Ans) Aniline gives litmus test

(42) What is ∆E for a system that does 500 cal of work on the surroundings when 300 cal of heat are absorbed by the system?

(a) –200 cal
(b) +200 cal
(c) +700 cal
(d) –700 cal
(Ans) –200 cal

(43) The molal elevation constant of water = 0.52 K molality –1. The boiling point of 1.0 molal aqueous KCl solution (assuming complete dissociation of KCl), should be:

(a) 100.52 0C
(b) 101.04 0C
(c) 99.48 0C
(d) 98.96 0C
(Ans) 101.04 0C

(44) Which elements out of the following can exhibit a maximum covalency of seven?

(a) Cl
(b) S
(c) F
(d) None of these
(Ans) Cl

(45) Urea is a diamide of:

(a) Biuret
(b) Carbonic acid
(c) Phosgene
(d) Formic acid
(Ans) Carbonic acid

(46) For the reversible isothermal expansion of one mole of an ideal gas at 300K, from a volume of 10 dm3 to 20 dm3, ∆H is

(a) 1.73 KJ
(b) –1.73 KJ
(c) 3.46 KJ
(d) Zero
(Ans) Zero

(47) AB, A2 and B2 are gaseous diatomic molecules. If ∆HA–A: ∆HA–B: ∆HB–B are 2: 2:1 and ∆H ° f of AB from A2 and B2 is –100 kJ mol ­1, then ∆H ° f of A(g) is:

(a) 200 kJ mol –¹
(b) 100 kJ mol –¹
(c) 50 kJ mol –¹
(d) 300 kJ mol –¹
(Ans) 200 kJ mol –¹

(48) A first order reaction was started with 0.1 M solution of the reactant. After 8 min 20 sec. it's concentration was found to be , then calculate the approximate rate constant (sec –1):

(a) 16.6 × 10 –³
(b) 2.303 × 10 –³
(c) 1.8 × 10 –⁴
(d) 24.6 × 10 –³
(Ans) 1.8 × 10 –⁴

(49) A molecule MX4 has a square planar shape. The number of non­bonding pairs of electrons around M is

(a) 2
(b) 1
(c) 3
(d) 0
(Ans) 2

(50) Alkali Metals have:

(a) Low density
(b) High ionization energies
(c) High M.P
(d) High tensile strength
(Ans) Low density

(51) Cesium oxide is expected to be

(a) Acidic
(b) Weakly basic
(c) Amphoteric
(d) Very strongly basic
(Ans) Very strongly basic

(52) Noble’s oil is

(a) Fire extinguisher
(b) Insecticide
(c) Explosive
(d) Detergent
(Ans) Explosive

(53) When the value of the azimuthal quantum number is 3, the magnetic quantum number has values

(a) +1, –1
(b) +1, 0, –1
(c) +2, +1, 0, –1, –2
(d) +3, +2, +1, 0, –1, –2, –3
(Ans) +3, +2, +1, 0, –1, –2, –3

(54) 1 g H2 gas at STP is expanded against 1 atm external pressure so that volume is doubled. Hence work done is:

(a) –22.4 L atm
(b) –5.6 L atm
(c) –11.2 L atm
(d) –44.8 L atm
(Ans) –11.2 L atm

(55) Which of the following metals is commonly used in photoelectric cells:

(a) Na
(b) Li
(c) Cs
(d) Mg
(Ans) Cs

(56) The natural materials from which an element can be extracted economically are called

(a) Ores
(b) Minerals
(c) Gangue
(d) None of the above
(Ans) Ores

(57) How much C.C. of oxygen will be liberated at N.T.P. by 2 amp current flowing for 3 minutes and 13 seconds through acidulated water:

(a) 11.2 CC
(b) 33.6 CC
(c) 44.8 CC
(d) 22.4 CC
(Ans) 22.4 CC

(58) The ionic mobilities of the cation and the anion of a salt A2B are 140 and 80 ohm–1 cm2 eq –1 respectively. The molar conductivity of the salt at infinite dilution is

(a) 160 ohm–¹cm² mol –¹
(b) 220 ohm–¹cm2 mol –¹
(c) 60 ohm–¹cm² mol –¹
(d) 360 ohm–¹ cm² mol –¹
(Ans) 360 ohm–¹ cm² mol –¹

(59) The number of photon of light having wavelength 100nm which can provide 1.00 J energy is nearly:

(a) 10 ⁷ photons
(b) 5 × 10 ¹⁸photons
(c) 5 × 10 ¹⁷photons
(d) 5 × 10 ⁷ photons
(Ans) 5 × 10 ¹⁷photons

(60) Which among the following does not contain an ionic bond:/

(a) NaOH
(b) HCl
(c) K2S
(d) LiH
(Ans) HCl

(61) The shape of XeF4 molecule is

(a) Planar triangular
(b) Tetrahedral
(c) Square pyramidal
(d) Square planar
(Ans) Square planar

(62) ReactionH+ + OH– → H2O + 57·1kJ1 mole of H2SO4 is mixed with 2 moles of NaOH. The heat evolved will be:

(a) 57·1KJ
(b) 2 × 57·1 KJ
(c) 3 kJ
(d) Cannot be determined
(Ans) 2 × 57·1 KJ

(63) One liter of a buffer solution containing 0·01M NH4Cl and 0·1 M NH4OH having pKb of 5 has pH of:/

(a) 9
(b) 4
(c) 6
(d) 10
(Ans) 10

(64) Identify the correct order in which the covalent radius of the following elements increases:(I) Ti(II) Ca(III) Sr

(a) III, I, II
(b) I, II, III
(c) II, III, I
(d) II, I, III
(Ans) I, II, III

(65) Which of the following is most stable towards heat:/

(a) CaCO3
(b) BaCO3
(c) SrCO3
(d) MgCO3
(Ans) BaCO3

(66) Carbolic acid is:

(a) Isopropyl alcohol
(b) Butyric acid
(c) Phenol
(d) Methanol
(Ans) Phenol

(67) The reactivity of the alkali metal sodium with water is made use of:

(a) In drying of alcohols
(b) In drying of benzene
(c) In drying of ammonia solution
(d) As a general drying agent
(Ans) In drying of benzene

(68) 7 white balls and 3 black balls are placed in a row at random. The probability that no two black balls are adjacent, is:

(a) 1/2
(b) 7/15
(c) 2/15
(d) 2/17
(Ans) 7/15

(69) The average weight of students in a class of 35 students is 40 kg. If the weight of the teacher be included, the average rises by the weight of the teacher is

(a) 40.5 kg
(b) 50 kg
(c) 41 kg
(d) 58 kg
(Ans) 58 kg

(70) A G.P. consists of an even number of terms. If the sum of all the terms is 5 times the sum of the terms occupying odd places, then the common ratio will be equal to

(a) 2
(b) 3
(c) 4
(d) 5
(Ans) 4

(71) The equation 12x 2 ­ 2y 2 ­ 6z 2 ­ 2xy ­ 8yz + 6zx = 0 represents

(a) A pair of straight lines
(b) A pair of planes
(c) A sphere
(d) None of these
(Ans) A pair of planes