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Identify from the following a… (Class 10 Science 2025, Q16)

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ScienceCBSE Class 10 · Board exam 2025, set 31/2/1 · 1 mark · MCQ

CBSE Class 10 Science 2025: question 16

Set in the CBSE Class 10 board exam of 2025, paper 31/2/1, section A, question 16, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q16 · 1 mark · MCQOur Environment

Identify from the following a group containing all non-biodegradable substances.

  1. (A)Leather, Glass, Plastic
  2. (B)Cotton, Wood, Nylon
  3. (C)DDT, Polyester, Glass
  4. (D)Leather, Silk, Wool

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/2/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Natural plant or animal materials are usually biodegradable.

Hint 2

Find the group that has no natural material in it.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Leather, cotton, wood, silk and wool are natural materials, and microbes can break them down. They are biodegradable.

  2. DDT (a pesticide), polyester (a synthetic fibre) and glass cannot be broken down by microorganisms. So every member of group (C) is non-biodegradable: (C).

    1 mark

Answer: (C) DDT, Polyester, Glass

Where the marks are

  • Chooses the group with all non-biodegradable items, option (C) (1 mark)

Revise the chapter

  • Chapter: Our Environment (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Our Environment, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 31/2/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.