GATE 2021 ES – Question 23

Solid and Hazardous Waste Management · Municipal Solid Waste Management · 1 mark · Multiple choice

Rank municipal-waste components from greatest to least biodegradability.

Food waste>newspaper>PVC
Newspaper>food waste>PVC
Food waste>PVC>newspaper
PVC>food waste>newspaper

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Correct answer: (A) Food waste>newspaper>PVC

Explanation

Food waste contains readily biodegradable organics. Newspaper’s cellulose degrades more slowly, with lignin and processing affecting accessibility. PVC is highly resistant to ordinary biological degradation. Thus **food waste>newspaper>PVC, A**.

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