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  • In the following groups of materials, which group (s) contains only non-biodegradable items (i) Wood, paper, leathe (ii) Polythene, detergent,PVC (iii)Plastic, detergent,grass (iv) Plastic, bakelite DDT (a) (iii) (b) (iv) (c) (i) and (iii) (d) (ii)and(iv)

In the following groups of materials, which group (s) contains only non-biodegradable items?
(i) Wood, paper, leather
(ii) Polythene, detergent, PVC
(iii) Plastic, detergent, grass
(iv) Plastic, bakelite, DDT

(a) (iii)                        (b) (iv)
(c) (i) and (iii)           (d) (ii) and (iv)

Answers (1)

(d)
Substances that cannot be broken down by biological processes in nature are non- biodegradable substances, e.g., polythene, detergent, PVC, plastics, Bakelite, DDT etc. On the other hand, substances that can be broken down by biological processes are said to be biodegradable, e.g., wood, paper, leather, grass, animal bones etc.

(ii) and (iv) contains non-biodegradable items.

Therefore option (D) is correct

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