PSC General Knowledge questions and answer
CHEMISTRY :
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First of all thank you for visiting this blog.Here i'm note down several questions and answers in the chemistry related G.K ,these are frequently asked in psc and other competitive exams. the questions here are selected with an aim to help the viewers learn more.These questions and answers will help the students to prepare for various competitions.
1. Which polymer is used for making bulletproof material?
Answer –
Polyethylene
2. Which major component is used in preparation of different types of glasses?
Answer – Silica
3. Which will you put into pure water in order to pass electric current through it?
Answer – Lemon Juice
4. With which name of the particle ‘Boson’ is associated?
Answer – S. N. Bose
5. Cooking gas is a mixture of which gases?
Answer – Butane and propane
6. What is the most abundant metal in the earth’s crust?
Answer – Aluminium
7. Which are the metal that is present in photo films?
Answer – Silver
8. Which element that does not occur in nature but can be produced artificially?
Answer – Plutonium
9. In vulcanisation, with which the natural rubber is heated?
Answer – Sulphur
10. Which chemical used as a ‘fixer’ in photography?
Answer – Sodium thiosulphate
11. Which does not wet the walls of the glass vessel in which it is kept?
Answer – Mercury
12. Acetyl salicylic acid is commonly used as which medicine?
Answer – A pain killer
13. Which acid used to remove ink spots?
Answer – Oxalic acid
14. All acids contain which element?
Answer – Hydrogen
15. In which processes light energy is converted into chemical energy?
Answer – Photosynthesis
16. Which metal used to pollute the air of a big city?
Answer – Lead
17. Which is a non-metal that remains liquid at room- temperature?
Answer – Bromine
18. Which pair does not contain a coinage metal?
Answer – Zinc and Gold
19. By which method is the age of most ancient geological formations estimated?
Answer – C4 method
20. What is the main constituent of natural gas?
Answer – Methane
21. For which thing is Washing soda the common name?
Answer – Sodium carbonate
22. By which permeabilty is a super conductor characterised?
Answer – Zero permeability
23. In colourful diamond, Why are different colours present?
Answer – Due to impurities
24. Which is an element which never exhibits positive oxidation state in any of its compounds?
Answer – Fluorine
25. Which is a major constituent of Biogas?
Answer – Methane
26. Which is the second most abundant metal in the earth’s crust?
Answer – Iron
27. Which alloy used in making heating elements for electric heating devices?
Answer – Nichrome
28. Which is the element found on the surface of the moon?
Answer – Titanium
29. Radioactive distintegration of uranium ultimately results in which formation?
Answer – Lead
30. Which variety of glass is heat resistant?
Answer – Pyrex glass
31. Which synthetic fibre is known as artificial silk?
Answer – Rayon
32. Which fertilizer has more nitrogen content?
Answer – Urea
33. Which is the essential element in all organic compounds?
Answer – Carbon
34. Which substance coated on plastic tape?
Answer – Iron oxide
35. Which is used in welding industry?
Answer – Acetylene
36. Which element present in the largest amount in rocks and minerals?
Answer – Silicon
37. Which is used as a material for making protective windows in space probes?
Answer – Diamond
38. Non-stick cooking utensils are coated with which metal?
Answer – Teflon
39. Which substance is a bad conductor of electricity but a good conductor of heat?
Answer – Mica
40. Which is the most nonreactive gas?
Answer – Hydrogen
41. ‘IC chips’ for computers are usually made of which metal?
Answer – Silicon
42. In fireworks, how is the green flame produced?
Answer – Because of barium
43. By which an element is best characterized?
Answer – By its atomic number
44. Which when dissolved in HO gives hissing sound?
Answer – Limestone
45. What are Rubies and Sapphires chemically known as?
Answer – Aluminium oxide
46. Which material is suitable for water purification?
Answer – Zeolites
47. Which glass is used in bullet proof screens?
Answer – Reinforced glass
48. What is used in preparing match sticks?
Answer – Red phosphorus
49. Which type of glass can cut off ultraviolet rays?
Answer – Crookes glass
50. From which are Contact lenses made?
Answer – Lucite
51. Which non-metals is not a poor conductor of electricity?
Answer – Selenium
52. Which polymeric material is used for making bullet proof jacket?
Answer – KEVLAR
53. Which type of glass is used for making glass reinforced plastic?
Answer – Quartz glass
54. Which is called philosopher’s wool?
Answer – Zinc oxide
55. Which metal is non toxic in nature?
Answer – Gold
56. What is a powerful eye irritant present in smog?
Answer – Sulphur dioxide
57. What is the main constituent of vinegar?
Answer – Acetic acid
58. Which of the toxic heavy metals is found in modern tannery industries?
Answer – Chromium
59. What are Carbon, diamond and graphite together called?
Answer – Allotropes
60. Galvanised iron sheets have a coating of which metal?
Answer – Zinc
61. Which are the high-temperature superconductors?
Answer – Ceramic oxides
62. By which can the location and energy of an electron in an atom be specified?
Answer – Quantum numbers
63. If a proton of mass m is moving with velocity of light, how will its mass?
Answer – Unchanged
64. A deuterium nucleus consists of which particles?
Answer – One proton and one neutron
65. Stainless steel is an alloy of which metals?
Answer – Iron, chromium and nickel
66. Which form of phosphorus is used in safety matches?
Answer – Red phosphorus
67. Which is the gas used to extinguish fire?
Answer – Carbon dioxide
68. Which is the element common to all acids?
Answer – Hydrogen
69. Which is the substance which can act both as an acid and a base?
Answer – Amphoteric
70. Which was the gas which had leaked out of Union Carbide factory in Bhopal?
Answer – Methyl isocynate
71. Which metal is found in ‘plaster of pairs’ ?
Answer – Calcium
72. Which is the main ingredient in cement ?
Answer – Lime stone
73. Which is the basis of modern periodic table?
Answer – Atomic number
74. Which are the important raw materials required in cement industry ?
Answer – Limestone and clay
75. What is the major ingredient of leather?
Answer – Collagen
76. Which metal is used for making boats because it does not corrode by seawater?
Answer – Titanium
77. Which nontoxic gas helps in formation of enzymes which ripen fruit?
Answer – Acetylene
78. Uranium eventually decays into a stable isotope of element?
Answer – Lead
79. Which contain high content of lead?
Answer – High octane fuel
80. Which is used in beauty parlours for’ hair setting?
Answer – Sulphur
81. The filament of an electric bulb is made of which metal?
Answer – Tungsten
82. What is the average salinity of sea water?
Answer – 3.5%
83. Which isotope of uranium capable of sustaining chain reactions?
Answer – U-235
84. Which is used as a filler in rubber tyres ?
Answer – Carbon black
85. By whom was the quantum theory first enunciated?
Answer – By Max Planck
86. Which charcoal is used to deeolourise raw sugar?
Answer – Wood charcoal
87. Which is the most important ore of aluminium?
Answer – Bauxite
88. Which is the metal used in storaoe batteries?
Answer – Lead
89. How are Oxygen and ozone?
Answer – Allotropes
90. Which is the best conductor of electricity ?
Answer – Silver
91. ‘Gobar gas’ contains mainly which gas?
Answer – Methane
92. Which is the gas usually filled in the electric bulb?
Answer – Nitrogen
93. Which are the Actinides elements with atomic numbers?
Answer – From 89 to 103
94. Which elements is obtained from sea weeds?
Answer – Iodine
95. Which type of glass is used in making lenses and prisms?
Answer – Flint glass
96. Rusting of iron is an example of which thing?
Answer – Slow oxidation
97. Which is also called Stranger Gas?
Answer – Xenon
98. Which chemical is used in foam fire extinguishers?
Answer – Aluminium sulphate
99. Which substance is used to retard the setting action of cement?
Answer – CaSO.2HO
100. What is a mixture of potassium nitrate, powdered charcoal and sulphur called?
Answer – Gun powder
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