Question

In the following groups of materials, which group/groups contain only non-biodegradable materials?

1. wood, paper, leather
2. polythene, detergent, PVC
3. plastic, detergent, grass
4. plastic, bakelite, DDT

पर्याय

• (iii)

• (iv)

• (i) and (iii)

• (ii) and (iv)

Answer 1

(ii) and (iv)

Explanation:

1. Wood, paper, leather – Biodegradable 
2. Polythene, detergent, PVC – All non-biodegradable 
3. Plastic, detergent, grass – Grass is biodegradable 
4. Plastic, bakelite, DDT – All non-biodegradable