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Explain the role of… (Class 10 Social Science 2025, Q31a)

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Social ScienceCBSE Class 10 · Board exam 2025, set 32/2/1 · 5 marks · Long answer

CBSE Class 10 Social Science 2025: question 31(a)

Set in the CBSE Class 10 board exam of 2025, paper 32/2/1, section D, question 31(a), for 5 marks. Try it first; the hints and our step-by-step solution are below.

Q31(a) · 5 marks · Long answerManufacturing Industries

Explain the role of industries in increasing air pollution and suggest measures to control it. (2+3=5)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 32/2/1.

Hints

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

Hint 1

Which gases and particles do factories release?

Hint 2

Think of devices fitted in factory chimneys.

Hint 3

Which fuels pollute less than coal?

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. Role of industries: they release undesirable gases such as sulphur dioxide and carbon monoxide, which raise the proportion of harmful gases in the air.

    1 mark

  2. Chemical and paper factories, brick kilns, refineries and smelting plants emit smoke and particulate matter such as dust and mist. Industries burning fossil fuels and ignoring pollution norms add to this, and toxic gas leaks are very hazardous.

    1 mark

  3. Measure: raise the height of chimneys to reduce particulate matter in the air.

    1 mark

  4. Fit smoke stacks with electrostatic precipitators, fabric filters, scrubbers and inertial separators.

    1 mark

  5. Use oil or gas instead of coal, and shift to renewable energy sources.

    1 mark

Answer: Industries emit harmful gases, smoke and particulates; control by taller chimneys, filters and cleaner fuels.

Where the marks are

  • Emission of harmful gases (1 mark)
  • Smoke, particulates and fossil fuel burning, with norms ignored (1 mark)
  • Taller chimneys (1 mark)
  • Precipitators, filters and scrubbers (1 mark)
  • Cleaner fuels and renewable energy (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Manufacturing Industries, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 32/2/1: 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.