Generated by claude-sonnet-4-6 · 2026-06-15 06:42 · grounding rag
Model Answer
(i) Kitchen waste — Composting (burying in a pit) is the best method, as it is biodegradable and converts waste into manure.
(ii) Metallic waste — Recycling/reuse, as metals can be melted and reformed into useful products.
(iii) Plastic bottles — Recycling, since plastic is non-biodegradable and persists in the environment for a long time.
(iv) Sanitary waste — Incineration (burning in a closed incinerator), as it destroys pathogens safely.
Source: Chapter 13, Section 13.2.2
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Explanation
- The question awards 2 marks for 4 sub-parts, so one crisp line per sub-part is sufficient.
- Examiners expect the method name + a brief reason (one phrase is enough).
- Kitchen waste → compost pit is directly supported by Activity 13.5 in the passage.
- Plastic is highlighted as non-biodegradable in the passage → recycling is the accepted answer.
- Sanitary waste is not in the passage but is standard CBSE board content → incineration is the expected answer.
- Do not write long explanations; one line per point is ideal here.