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Environmental Pollution (Class VIII)

Air, Water, and Environmental Pollution

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

________ industries release putrefied organic matter.

  1. Pharmaceutical
  2. Paper
  3. Food
  4. Detergent
Question 2 Multiple Choice (Single Answer)

The optimum condition for BOD measurement is

  1. 25 degree centigrade / light / 5d
  2. 25 degree centigrade / dark / 5d
  3. 30 degree centigrade / dark / 5d
  4. 30 degree centigrade / light / 5d
Question 3 Multiple Choice (Single Answer)

What is the BOD value of pure drinking water?

  1. 0
  2. 1
  3. 100
  4. 30
Question 4 Multiple Choice (Single Answer)

Agricultural sources are the cause of

  1. greenhouse effect
  2. toxicity in rivers
  3. eutrophication
  4. change in pH of rivers
Question 5 Multiple Choice (Single Answer)

Which fish is used to keep water clean?

  1. Electric ray
  2. Gambusia
  3. Silver fish
  4. Paradise fish
Question 6 Multiple Choice (Single Answer)

_______ is caused by drinking water contaminated with nitrates.

  1. Carboxyhaemoglobin
  2. Diarrhoea
  3. Methemoglobinema
  4. Dysentery
Question 7 Multiple Choice (Single Answer)

What is the largest source of water pollution in India?

  1. Agricultural source
  2. Industrial effluents
  3. Untreated sewage
  4. Thermal power stations
Question 8 Multiple Choice (Single Answer)

What is/are the effect(s) of thermal discharge on river water?

  1. It heats up the water and destroys aquatic life.
  2. It decreases oxygenation.
  3. It increase the toxicity of toxic pollutants.
  4. All of the above
Question 9 Multiple Choice (Single Answer)

________ is caused due to water pollution.

  1. Cancer
  2. AIDS
  3. Malaria
  4. Jaundice
Question 10 Multiple Choice (Single Answer)

What is the main function of NGRBA?

  1. To monitor purity of water all year around
  2. To finance, implement, monitor, plan and coordinate the pollution of Ganges
  3. To collect information about air pollutants
  4. To advise Government of India on issues of conservation
Question 11 Multiple Choice (Single Answer)

How much rems of exposure is required to damage the reproductive tract?

  1. More than 200-500 rems
  2. Less than 200 rems and more than 100 rems
  3. 1000-5000 rems
  4. Approx. 100 rems
Question 12 Multiple Choice (Single Answer)

What is the spread of radioactive pollution through Earth's atmosphere called?

  1. Radioactive air pollution
  2. Radioactive rain
  3. Smog
  4. Fallout
Question 13 Multiple Choice (Single Answer)

________ is caused due to mercury pollution.

  1. Miamata
  2. Methemoglobinema
  3. Cholera
  4. Asbestosis
Question 14 Multiple Choice (Single Answer)

What happens in secondary treatment of sewage water?

  1. Large objects and undissolved impurities are removed.
  2. Water is aerated.
  3. Nitrates and phosphates are removed.
  4. Germs are killed by adding chlorine.
Question 15 Multiple Choice (Single Answer)

What is the main source of surface water pollution?

  1. Use of fertilisers and pesticides
  2. Open defecation
  3. Domestic sewage
  4. Throwing garbage on land
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