Solid Waste Management MCQ with answer and solution

Concept

The 3R principle in solid waste management means Reduce, Reuse and Recycle.

Step-by-step solution

1. Write the 3R principle: Reduce, Reuse, Recycle. 2. Check each option against this list. 3. Reduce, Reuse and Recycle are in the list. 4. Recover is not one of the 3Rs. 5. So the answer is (D) Recover.

Explanation

The 3R principle has three parts: Reduce (make less waste), Reuse (use items again) and Recycle (make new products from waste). Recover (energy or material recovery) is added only in extended models like 4R or 5R. It is not part of the basic 3R principle.

Why the other options are wrong

(A) Reduce is the first R of 3R. (B) Reuse is the second R of 3R. (C) Recycle is the third R of 3R.

Shortcut

3R = Reduce, Reuse, Recycle. Any other word is the answer.

Common mistake

Students confuse 3R with 4R/5R models, where Recover is included.