NCERT Class VIII Science Solutions: Chapter 18-Pollution of Air and Water Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Question 1:

Air is a mixture of various gases. One of the gases is part of the air and is essential for the survival of human beings. This gas is

  1. Nitrogen
  2. Oxygen
  3. Ozone
  4. Argon

Answer: B

Question 2:

Which of the following is not a source of air pollution?

  1. Automobile exhaust
  2. Burning of firewood
  3. Windmill
  4. Power plant

Answer: C

Source of Air Pollution

Question 3:

Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school?

  1. Car
  2. School bus
  3. Auto rickshaw
  4. Scooter

Answer: B

Question 4:

Which of the following is not a way to conserve water?

  1. Replace
  2. Reduce
  3. Reuse
  4. Recycle

Answer: A

Question 5:

The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is

  1. Air pollution
  2. Water pollution
  3. Soil pollution
  4. Noise pollution

Answer: A

Question 6:

Incomplete combustion of fuel such as petrol and diesel gives

  1. Nitrogen oxide
  2. Sulphur dioxide
  3. Carbon monoxide
  4. Carbon dioxide

Answer: C

Question 7:

The phenomenon of marble cancer is due to

  1. Soot particles
  2. Fog
  3. Acid rain

Answer: D

Marble Cancer