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Explain any three… (Class 10 Social Science 2025, Q28b)

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Social ScienceCBSE Class 10 · Board exam 2025, set 32/6/1 · 3 marks · Short answer

CBSE Class 10 Social Science 2025: question 28(b)

Set in the CBSE Class 10 board exam of 2025, paper 32/6/1, section C, question 28(b), for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q28(b) · 3 marks · Short answerResources and Development

Explain any three factors responsible for air pollution.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 32/6/1.

Hints

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

Hint 1

Name the gases released when fuels are burnt.

Hint 2

Which industries and kilns emit smoke?

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. Air pollution is caused by a high proportion of undesirable gases such as sulphur dioxide and carbon monoxide.

    1 mark

  2. Airborne particulates such as dust, spray, mist and smoke are released. Smoke comes from chemical and paper factories, brick kilns, refineries and smelting plants, and from burning fossil fuels in factories that ignore pollution norms.

    1 mark

  3. Toxic gas leaks are hazardous with long-term effects, and air pollution harms human health, animals, plants, buildings and the atmosphere.

    1 mark

Answer: Harmful gases, particulate matter and smoke from industries and fossil fuels, and toxic gas leaks cause air pollution.

Where the marks are

  • Undesirable gases such as SO2 and CO (1 mark)
  • Particulate matter and smoke from factories, kilns and burning of fossil fuels (1 mark)
  • Toxic gas leaks and their harmful effects (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Resources and Development, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 32/6/1: 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.