General Science Questions and Answers for TNPSC Exam Part 3
41. Which gas is commonly used in fire
extinguishers because it inhibits combustion?
Carbon dioxide (CO2)
42. What is the chemical formula for methane,
a greenhouse gas released during the digestion of food in animals?
CH4
43. What is the chemical formula for water
vapor?
H2O
44. Which gas is used in the production of
soda water and carbonated soft drinks?
Carbon dioxide (CO2)
45. What is the chemical formula for hydrogen
peroxide, a common disinfectant and bleaching agent?
H2O2
46. What is the chemical formula for acetic
acid, the main component of vinegar?
CH3COOH
47. Which gas is released during the
fermentation process in bread-making and brewing?
Carbon dioxide (CO2)
48. What is the chemical formula for nitrous
oxide, a gas commonly used as an anesthetic in dentistry and surgery?
N2O
49. Which gas is used in the inflation of
balloons to make them float in the air?
Helium (He)
50. What is the chemical formula for
phosphoric acid, a common ingredient in carbonated soft drinks?
H3PO4
51. Which gas is responsible for the formation
of acid rain when it combines with water vapor in the atmosphere?
Sulfur dioxide (SO2)
52. What is the chemical formula for
hydrochloric acid, a strong acid used in various industrial processes?
HCl
53. Which gas is commonly used in the
preservation of food items to extend their shelf life?
Carbon dioxide (CO2)
54. What is the chemical formula for
formaldehyde, a chemical used in the production of plastics and resins?
CH2O
55. Which gas is used in the process of
welding and cutting metals due to its high reactivity with oxygen?
Acetylene (C2H2)
56. What is the chemical formula for hydrogen
chloride gas, which forms hydrochloric acid when dissolved in water?
HCl
57. Which gas is used as a fuel for rockets
and spacecraft due to its high energy content?
Hydrogen (H2)
58. What is the chemical formula for nitric oxide, a gas involved in various physiological processes in the human body?
NO
59. Which gas is used in the process of
refrigeration to cool and preserve food?
Chlorofluorocarbons (CFCs)
60. What is the chemical formula for carbon
tetrachloride, a colorless liquid used in fire extinguishers and as a solvent?
CCl4
