Multiple choice

Which of the following is a pollutant?

  1. Ammonia gas

  2. Hydrogen sulphide

  3. Freon (these are chloro flouro gases used for cooling purpose in refrigerators)

  4. Chlorine gas

  5. Carbon dioxide
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Carbon dioxide is present in large quantity in environment. So, it is called as pollutant. All other options are called contaminants because they are present in small quantities. A substance which enters environment due to man's activities and affects it in a bad way is called contaminant. A substance which is present in large quantity in environment and affects it in bad way is called pollutant.

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