Multiple choice

The water from water bodies or pipes sometimes smells like rotten eggs. Which of these gases may be reason for the foul smell?

  1. Carbon dioxide

  2. Carbon monoxide

  3. Nitrogen dioxide

  4. Nitrogen

  5. Hydrogen sulphide
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Hydrogen sulphide produces the foul smell in the water bodies. Sulphur reducing bacteria present in groundwater use sulphur as an energy source and chemically change sulphates to produce hydrogen sulphide.

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