1. Which one of the following is not a Major Abiotic Factors?
Correct : D. Air
2. Optical fibre works on the principle of
Correct : D. total internal reflection
3. The colours of stars depend on their –
Correct : A. temperature
4. Water has maximum density at –
Correct : C. 4°C
5. Which of the following colour of light deviates least through the prism?
Correct : D. red
6. Hydraulic brakes work on the principle of –
Correct : D. PascaQl's law
7. X- rays are waves.
Correct : C. Electromagnetic
8. Which planet is nearest to the sun?
Correct : C. Mercury
9. The moon that we see in the sky is a
Correct : D. Satellite
10. The absolute zero is a temperature at which .
Correct : A. molecular motion in a gas would cease
11. The term "infrasonic" applied to sound refers to sound waves below -
Correct : C. 20 Hz
12. If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states that?
Correct : D. Principle of conservation of linear momentum
13. A body moving in a circular path with a constant speed has a –
Correct : C. constant kinetic energy
14. The large collection of stars, dust and gas held together by gravitational attraction between components is known as –
Correct : C. Galaxy
15. The working of a rocket is based on the principle of:
Correct : A. Conservation of momentum
16. Light waves projected on oil surface show seven colours due to the phenomenon of
Correct : D. interference
17. Which of the following has the maximum specific heat capacity?
Correct : A. water
18. Which variety of glass is heat resistant?
Correct : C. Pyrex glass
19. The waves used in sonography are –
Correct : D. Ultrasonic waves
20. Which of the following is a scalar quantity?
Correct : C. Angular momentum
21. The sky appears blue due to –
Correct : A. Rayleigh scattering
22. The device used to convert solar energy into electricity is –
Correct : A. Photovoltaic cell
23. The absorption of ink by blotting paper involves -
Correct : A. capillary action phenomenon
24. A fuse wire is made of:
Correct : B. an alloy of tin and lead
25. Which instrument is used to measure depth of ocean?
Correct : D. Fathometer
26. When a running car stops suddenly, the passengers tends to lean forward because of:
Correct : C. inertia of motion
27. Why the Earth is having its own atmosphere?
Correct : C. Gravity
28. A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear
Correct : B. White
29. It is difficult to walk on ice because of.
Correct : A. absence of friction
30. One bar is equal to – (1) 10 ³ Pa
Correct : C. 10 ⁴ Pa
31. A NOT gate can be implemented by:
Correct : D. a single transistor
32. Persistence of vision is the Principle behind:
Correct : B. Cinema
33. Sudden fall in barometer is indication of
Correct : C. Tide
34. If in a motion, the axis of the rotation does not pass through the object, then the motion is called -
Correct : D. Orbital motion
35. Who among the following evolved the concept of relationship between mass and energy?
Correct : A. Einstein
36. Super cooling is cooling of liquid .
Correct : B. below freezing point
37. The base of an electric iron is brightly polished mainly -
Correct : C. to reduce heat loss by radiation
38. Oparin's theary about origin of life' is related to -
Correct : A. chemical evolution
39. Heat given to a body which raises its temperature by 1°C is known as -
Correct : B. thermal capacity
40. Flemings "Left hand Rule" is associated with the effect of –
Correct : D. Magnetic Field on current
41. The force which makes a vehicle to stop when break is applied is called –
Correct : C. frictional force
42. In radio-communication, the signals emitted by transmitting antenna are reflected on –
Correct : C. ionosphere
43. While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
Correct : B. The fuel is not burning completely
44. If electrical conductivity increases with the increase of temperature of a substance, then it is a
Correct : B. Semiconductor
45. Automatic wrist watches get energy from -
Correct : A. twist in spring
46. Radian is used to measure -
Correct : C. Angle
47. Which one of the following types of glass can cut off ultraviolet rays?
Correct : D. Crookes glass
48. Light year is a unit of –
Correct : C. Distance
49. The word 'insulation' means –
Correct : B. incoming solar radiation
50. Which of the following is not a vector quantity?
Correct : A. Speed
51. An object with a constant speed –
Correct : A. is not accelerated
52. The instrument used to regulate temperature to a particular degree is called :
Correct : A. Thermostat
53. The power dissipated in a resistance is given by?
Correct : C. All of these
54. The technique used by bats to find their way or to locate food is .
Correct : C. Echolocation
55. In the absence of the earth's atmosphere, sky would appear –
Correct : D. black
56. If ice floating on water in a vessel melts, the water level in the vessel -
Correct : B. does not change
57. One micron is equal to-
Correct : C. 1/1000th of mm
58. Quality of a musical note depends on –
Correct : C. Harmonics present
59. Silicon is used in which of the following?
Correct : D. All of these
60. The frequency of direct current is .
Correct : A. Zero
61. For photoelectric effect to take place, the metal used as the cathode should have –
Correct : C. low work function
62. If electric resistance is to be decreased, then the number of resistances should be connected in –
Correct : B. Parallel
63. The material used in electric heater is
Correct : B. Nichrome
64. The rate of change of displacement is called:
Correct : D. Velocity
65. The direction of heat flow between two objects depends on -
Correct : C. Their temperatures
66. A man in a train moving with a constant velocity drops a ball on the platform. The path of the ban as seen by an observer standing on the platform is –
Correct : C. A parabola
67. Which of the following is responsible for permanent hardness of water?
Correct : C. calcium sulphate
68. While ascending a hill, the driver of the vehicle keeps the gear ratio –
Correct : D. either equal to or greater than 1
69. A wire of resistance R is cut into ‘n’ equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be –
Correct : D. R/n²
70. What is unit of Electrical Capacity?
Correct : B. farad
71. Work done upon a body .
Correct : B. only a scalar quantity
72. With the increase of pressure, the boiling point of any substance -
Correct : A. Increases
73. When a particle and an antiparticle come in contact with each other, they
Correct : B. annihilate each other
74. Photon is the fundamental unit/ quantum of –
Correct : D. light
75. Time of exposure required for taking photograph of an object depends upon the –
Correct : A. brightness of the object
76. The ordinary and maximum tolerance limit of sound by human being is –
Correct : B. 60 db to 80 db (decibel)
77. Which is best used as a sound absorbing material in partition walls?
Correct : C. Glass - wool
78. The best conductor of electricity among the following is -
Correct : D. silver
79. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
Correct : D. radio waves
80. The primary colours in photography are –
Correct : A. Red, Blue, Yellow
81. Two electrons in an orbital are differentiated by which of the following?
Correct : B. Spin quantum number
82. Stress can be defined as quantity.
Correct : D. Tensor
83. Which of the following property of sound is affected by change in air temperature –
Correct : D. Wavelength
84. Vehicles use to see the objects coming from behind.
Correct : B. Convex lens
85. If electrical conductivity increases with the increase of temperature of a substance, then it is a:
Correct : B. Semiconductor
86. Transition ions absorb light in –
Correct : D. visible region
87. If a body weighs 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?
Correct : B. 2N
88. 'Kilowatt-hour' is the unit of -
Correct : C. electric energy
89. If the temperature inside a room is increased, the relative humidity will ?
Correct : B. decrease
90. The device used to change the speed of an electric fan is -
Correct : B. Regulator
91. The required DC voltage for arc welding is-
Correct : C. 200 to 250 V
92. What is the base of the Octal Numeral System?
Correct : A. 8
93. A wire carrying current is –
Correct : C. neutral
94. A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair
suffers.
Correct : D. total internal reflection
95. Which of the following physical quantities has no dimension?
Correct : D. Angle
96. Which of the following is a good conductor of heat but bad conductor of electricity?
Correct : A. mica
97. Respiration in the absence of air is called -
Correct : B. Anaerobic respiration
98. Which one among the following is responsible for formation of "Ozone Holes" in the atmosphere?
Correct : C. Chlorofluorocarbons
99. An alloy is an example of :
Correct : C. Solid solution
100. Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be -