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Air and Its Constituents

Questions about the composition of air, properties of atmospheric gases, combustion processes involving oxygen, acid rain, and the greenhouse effect.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following options correctly describes greenhouse effect?

  1. The retention of heat energy by greenhouse gases
  2. When rainwater becomes acidic due to the presence of sulphur and nitogen
  3. Planting of trees in order to reduce air pollution
  4. The release of oxygen during photosynthesis
  5. None of these
Question 2 Multiple Choice (Single Answer)

Which of the following solutions filled in fire extinguishers reacts with sulphuric acid to form carbon dioxide?

  1. Sodium carbonate
  2. Sodium bicarbonate
  3. Calcium chloride
  4. Calcium carbonate
  5. Carbon monoxide
Question 3 Multiple Choice (Single Answer)

Automobile emissions can be checked by installing which device?

  1. Catalytic converter
  2. Electrostatic precipitators
  3. Scrubbers
  4. Compressed Natural Gas
  5. Exhausts
Question 4 Multiple Choice (Single Answer)

Burning of candles and fuels is an example of

  1. rapid oxidation
  2. slow oxidation
  3. spontaneous oxidation
  4. reduction
  5. None of these
Question 5 Multiple Choice (Single Answer)

The unburnt particles released during combustion of fuels are called

  1. spores
  2. dust
  3. soot
  4. mist
  5. fog
Question 6 Multiple Choice (Single Answer)

What is rust?

  1. It is an oxide of chromium.
  2. It is aluminium cholride.
  3. It is ferric chloride.
  4. It is a reddish brown hydrated oxide of iron.
  5. None of these
Question 7 Multiple Choice (Single Answer)

What is the percentage of argon in the air?

  1. 21%
  2. 0.03%
  3. 0.04%
  4. 0.9%
  5. 78%
Question 8 Multiple Choice (Single Answer)

Which of the following is used as a catalyst in the laboratory preparation of oxygen?

  1. Magnesium chloride
  2. Nickel
  3. Hydrogen
  4. Helium
  5. Manganese dioxide
Question 9 Multiple Choice (Single Answer)

Which gas is preferred over hydrogen in hot air balloons?

  1. Helium
  2. Argon
  3. Neon
  4. Krypton
  5. Xenon
Question 10 Multiple Choice (Single Answer)

Which of the following gases is used in welding metals?

  1. Argon
  2. Krypton
  3. Xenon
  4. Helium
  5. Neon
Question 11 Multiple Choice (Single Answer)

Which of the following gases is used as a cooling agent in refrigeration?

  1. Chlorofluorocarbon(CFC)
  2. Oxygen
  3. Carbon dioxide
  4. Nitrogen
  5. Ozone
Question 12 Multiple Choice (Single Answer)

The transformation of atmospheric nitrogen into a usable form is known as

  1. nitrogen transformation
  2. nitrogen synthesis
  3. nitrogen fixation
  4. nitrogen ejection
  5. None of these
Question 13 Multiple Choice (Single Answer)

Dry ice sublimes at what temperature?

  1. -56.4oC
  2. 90oC
  3. -83oC
  4. -54oC
  5. -73oC
Question 14 Multiple Choice (Single Answer)

Acid rain is mostly caused by emissions of

  1. sulphur and chlorine
  2. hydrogen and oxygen
  3. sulphur and nitrogen
  4. carbon dioxide
  5. carbon monoxide
Question 15 Multiple Choice (Single Answer)

Cooling down of water vapour in the air higher up in the atmosphere is known as

  1. condensation
  2. precipitation
  3. evaporation
  4. sublimation
  5. None of these
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