Multiple choice

Which of the following is biodegradable pollutant?'

  1. Hg salts

  2. Domestic sewage

  3. Polythene

  4. Alcans
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Domestic sewage contains organic matter that can be broken down by microorganisms through natural decomposition processes. Unlike polythene, alkanes, or mercury salts which are non-biodegradable and persist in the environment for long periods.

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