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Question

In the following groups of materials, which group(s) contains only non-biodegradable items?

A
wood, paper, leather
B
polythene, detergent, PVC
C
plastic, detergent, grass
D
plastic, bakelite, DDT
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Solution
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Correct option is D. plastic, bakelite, DDT
Non-biodegradable substances are the substances that can't be decomposed or degraded into simpler molecules by the action of microbes. Therefore these substances remain in nature for a long period of time. These include polythene, detergent, PVC (Polyvinyl chloride, a synthetic polymer of plastic) plastic, bakelite, DDT (a pesticide) etc.
Biodegradable substances can be decomposed into simpler molecules by the action of microbes. These include wood, paper, leather, grass etc.
So, the correct answer is option B and D.

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