PSC PHYSICAL SCIENCE QUESTIONS AND ANSWERS
PHYSICAL SCIENCE QUESTIONS AND ANSWERS / PSC Questions and Answers:- PSC Degree Level Questions and Answers - KAS Questions and Answers / PSC New Pattern Syllabus Question
* PSC Exam Questions and Answers
1. The substance that can be used as a hypnotic:
Barbituric acid
2. The ‘fixing agent’ used in photograhic film is:
Sodium thiosulphate
3. The maximum concentration of ozone is found in the:
Stratosphere
4. The Halogen which is used as an antiseptic:
Iodine
5. The lightest noble gas:
Helium
6. Cetane number is used to rate:
Diesel
7. Plaster of Paris is prepared by heating:
Gypsum
8. The heaviest of Alkaline earth metals:
Radium
9. Which metal foil is used for packing chocolates, medicines, cigarettes etc?
Aluminium
10. As per Avogadro’s hypothesis, equal volume of different gases at the same temperature and pressure contain equal number of:
Molecules
11. The element with the largest number of isotopes:
Tin
12. Which property of copper and aluminium makes them suitable for making cooking utensils and boilers?
High thermal conductivity
13. Silver objects turn dark on prolonged exposure to air due to the formation of: Silver
Sulphide
14. In which type of rocks petroleum is found?
Sedimentary
15. The green coating on the surface of copper objects kept exposed to moist air is due to the formation of:
Basic copper carbonate
16. What is the full form of P.V.C.?
Poly Venyl Chloride
17. Hydrogen in liquid form is used as:
Rocket fuel
18. In which form cooking gas is supplied cylinders for domestic consumption?
Liquid
19. The process used in dairies to separate cream from milk is:
Centrifugation
20. Radio Carbon dating was discovered by:
Willard Franck Libby
21. Development of unpleasant smell and taste in oil and fat containing food items due to oxidation of atmospheric oxygen is called:
Rancidity
22. An anti-oxidant often added to fat containing foods to prevent rancidity:
Butyrated hydroxi anisole
23. The most abundant type of coal:
Bituminous
24. Pigments obtained from plants can be separated by:
Chromatography
25. Which is called the ‘Mother of Pearl’?
Nacre
26. Teflon, the tough and fire resistant polymer, containing the halogen:
Flourine
27. The glass used to make optical instruments:
Flint glass
28. Molish test is used to detect the presence of:
Carbohydrates
29. The acid used to make permanent writing on the surface of glass:
Hydrofluric acid
30. What is the full form of LPG?
Liquified Petroleum Gas
31. Cyclonite is also known as:
RDX
32. A non metal other than carbon which shows allotropy is:
Sulphur
33. The radioactive isotope used to determine the activity of thyroid gland is:
Iodine-131
34. Camphor can be separated from sand by:
Sublimation
35. Which halogen is contained in DDT?
Chlorine
36. Smoke, fog and mist are examples of:
Aerosols
37. Iron that contains the highest percentage of carbon:
Pig Iron
38. Acidity in milk is caused by:
The activity of enzymes
39. Which element has the lowest melting point?
Helium
40. The element with the highest density
Osmium
41. The lightest metal:
Lithium
42. The element with the highest boiling point:
Tungsten
43. Which element has the second highest density?
Iridium
44. The most abundant metal in human body:
Calcium
45. What percent of the atmosphere is Oxygen?
20.95
46. What percent of the mass of human body is Oxygen?
65
47. The most common element on the earth’s crust by mass:
Oxygen
48. The most abundant element in the moon:
Oxygen
49. Which metal has the highest melting point?
Tungsten
50. The most abundant metal in the whole earth:
Iron
51. The substance that can be used as a hypnotic:
Answer: Barbituric acid
52. The ‘fixing agent’ used in photograhic film is:
Answer: Sodium thiosulphate
53. The maximum concentration of ozone is found in the:
Answer: Stratosphere
54. The Halogen which is used as an antiseptic:
Answer: Iodine
55. The lightest noble gas:
Answer: Helium
56. Cetane number is used to rate:
Answer: Diesel
57. Plaster of Paris is prepared by heating:
Answer: Gypsum
58. The heaviest of Alkaline earth metals:
Answer: Radium
59. Which metal foil is used for packing chocolates, medicines, cigarettes etc?
Answer: Aluminium
60. As per Avogadro’s hypothesis, equal volume of different gases at the same temperature and pressure contain equal number of:
Answer: molecules
61. The element with the largest number of isotopes:
Answer: Tin
62. Which property of copper and aluminium makes them suitable for making cooking utensils and boilers?
Answer: High thermal conductivity
63. Silver objects turn dark on prolonged exposure to air due to the formation of:
Answer: Silver sulphide
64. In which type of rocks petroleum is found?
Answer: Sedimentary
65. The green coating on the surface of copper objects kept exposed to moist air is due to the formation of:
Answer: Basic copper carbonate
66. What is the full form of P.V.C.?
Answer: Poly Venyl Chloride
67. Hydrogen in liquid form is used as:
Answer: rocket fuel
68. In which form cooking gas is supplied cylinders for domestic consumption?
Answer: Liquid
69. The process used in dairies to separate cream from milk is:
Answer: Centrifugation
70. Radio Carbon dating was discovered by:
Answer: Willard Franck Libby
71. Development of unpleasant smell and taste in oil and fat containing food items due to oxidation of atmospheric oxygen is called:
Answer: Rancidity
72. An anti-oxidant often added to fat containing foods to prevent rancidity:
Answer: Butyrated hydroxi anisole
73. The most abundant type of coal:
Answer: Bituminous
74. Pigments obtained from plants can be separated by:
Answer: Chromatography
75. Which is called the ‘Mother of Pearl’?
Answer: Nacre
76. Teflon, the tough and fire resistant polymer, containing the halogen:
Answer: Flourine
77. The glass used to make optical instruments:
Answer: Flint glass
78. Molish test is used to detect the presence of:
Answer: Carbohydrates
79. The acid used to make permanent writing on the surface of glass:
Answer: Hydrofluric acid
80. What is the full form of LPG?
Answer: Liquified Petroleum Gas
81. Cyclonite is also known as:
Answer: RDX
82. A non metal other than carbon which shows allotropy is:
Answer: Sulphur
83. The radio active isotope used to determine the activity of thyroid gland is:
Answer: Iodine-131
84. Camphor can be separated from sand by:
Answer: Sublimation
85. Which halogen is contained in DDT?
Answer: Chlorine
86. Smoke, fog and mist are examples of:
Answer: Aerosols
87. Iron that contains the highest percentage of carbon:
Answer: Pig Iron
88. Acidity in milk is caused by:
Answer: The activity of enzymes
89. Which element has the lowest melting point?
Answer: Helium
90. The element with the highest density:
Answer: Osmium
91. The lightest metal:
Answer: Lithium
92. The element with the highest boiling point:
Answer: Tungsten
93. Which element has the second highest density?
Answer: Iridium
94. The most abundant metal in human body:
Answer: Calcium
95. What percent of the atmosphere is Oxygen?
Answer: 20.95
96. What percent of the mass of human body is Oxygen?
Answer: 65
97. The most common element on the earth’s crust by mass:
Answer: Oxygen
98. The most abundant element in the moon:
Answer: Oxygen
99. Which metal has the highest melting point?
Answer: Tungsten
100. The most abundant metal in the whole earth:
Answer: Iron
101. A person can swim comfortable in water. This is due to:
Answer: Newton's third law
102. A type of stone that can float on water:
Answer: Pumice stone
103. An idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence:
Answer: Black body
104. Brilliance of diamond is due to:
Answer: Total internal refecion
105. Colour of a star depends upon its:
Answer: Temperature
106. Endoscopy, a technique used to explore the stomoach or other inner parts of the body, is based on the principle of:
Answer: Total Internal Reflection
107. GSM stands for:
Answer: Global System of Mobile Communications
108. How many carats is pure gold?
Answer: 24 carats
109. Hydrogen bomb is based on the principle of:
Answer: Uncontrolled fusion reaction .
110. Hydrogen spectrum was first explained by:
Answer: Niels Bohr
111. If the electrical resistance of a typical substance suddenly drops to zero, then the substance is called:
Answer: Super conductor
112. If there is no atmosphere the length of the day would:
Answer: Decrease
113. In which date. Įndia's Chandrayan was launched: -
Answer: 2008 October 2212
114. Kaleidoscope is based on the principle of:
Answer: Multiple Reflection
115. Magnetic field of electric current was discovered by:
Answer: Oesterd '
116. Magnetism at the centre of a bar magnet is:
Answer: Zero
117. Materials for rain-proof coats and tents owe their water proof properties to:
Answer: Surface tension :-
118. Name the inventor of Black Box Flight recorder:
Answer: David Warren
119. Noise is measured in:
Answer: Decibel
120. Nuclear sizes are expressed in a unit called
Answer: "Fermi"
121. Ponds look shallow because of:
Answer: Refraction
122. Short-sight in human eye can be rectified by:
Answer: Concave lens
123. Sound frequency below 20 Hz is called:
Answer: Infrasonic
124. The Automated Teller Machine (ATM) was invented by:
Answer: John Shepard Barren
125. The density of air is:
Answer: 1.3 kg /cubic metre
126. The electromagnetic waves do not transport:
Answer: Information
127. The energy absorbed during the change of a state : of substance is called:
Answer: Latent heat
128. The energy that travels through telephone line:
Answer: Electrical energy
129. The expected energy of electrones at absolute zerois called:
Answer: Fermi Energy
130. The first ballistic missile was developed under direcition of :
Answer: Wernher von Braun
131. The lowest temperature boyond which matter is not able to be cooled is ---------- dogree Celcius;
Answer: Minus 273
132. The mass of a body is 8kg on earth. What is its mass in moon:
Answer: 8kg
133. The minimum temperature at which a combustible substance catches fire is called:
Answer: Ignition temperature
134. The mirror used in search light is:
Answer: Parabolic
135. The reagent used to test the presence of starch in leaves is:
Answer: lodine solution
136. The type of glass which can cut off ultra violet rays:
Answer: Crookes glass
137. The unit of electric charge is:
Answer: Coulomb
138. The unit of measuring distance between the stars is called:
Answer: Light Year
139. The temperature below which the water vapor in a volume of humid air at a constant barometric pres sure will condense into liquid water, is called:
Answer: Dew Point
140. Unit of illuminance and luminous emittance:
Answer: Lux
141. What is called 'the brain of a computer':
Answer: CPU
142. When milk is churned, the cream separates from it due to:
Answer: Centrifugal force
143. When the temperature of a metal is raised, its conductance:
Answer: decreases -
144. Which type of glass is used for making glass reinforced plastic:
Answer: Fibre Glass
145. Which type of heat treatment helps steel to bend:
Answer: Annealing
146. Which type of reaction produces most harmful radiation:
Answer: Fission reaction
147. Who discovered Unix operating system:
Answer: Dennis Ritchie
148. Who first used the term 'Nanotechnology:
Answer: Nario Taniguchi
149. Who invented optical fibre:
Answer: Narinder Kapany
150. Who is known as 'the father of personal computer':
Answer: Henri Edward Roberts
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