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Describe any five… (Class 10 Social Science 2024, Q31b)

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Social ScienceCBSE Class 10 · Board exam 2024, set 32/4/1 · 5 marks · Long answer

CBSE Class 10 Social Science 2024: question 31(b)

Set in the CBSE Class 10 board exam of 2024, paper 32/4/1, section D, question 31(b), for 5 marks. Try it first; the hints and our step-by-step solution are below.

Q31(b) · 5 marks · Long answerWater Resources

Describe any five steps taken to save fresh water from industrial pollution.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 32/4/1.

Hints

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

Hint 1

Think of reducing water use and treating waste.

Hint 2

Recall the three phases of effluent treatment.

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. Reduce water use in processing by reusing and recycling it in two or more successive stages.

    1 mark

  2. Harvest rainwater to meet water needs.

    1 mark

  3. Treat hot water and effluents before releasing them into rivers and ponds.

    1 mark

  4. Primary treatment is mechanical (screening, grinding, flocculation, sedimentation). Secondary treatment is biological.

    1 mark

  5. Tertiary treatment uses biological, chemical and physical processes and recycles the wastewater. Green belts also help ecological balance.

    1 mark

Answer: Recycle water, harvest rain, treat effluents in stages and maintain green belts.

Where the marks are

  • Reuse and recycling (1 mark)
  • Rainwater harvesting (1 mark)
  • Treating effluents before release (1 mark)
  • Primary and secondary treatment (1 mark)
  • Tertiary treatment or green belts (1 mark)

Revise the chapter

  • Chapter: Water Resources (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Water Resources, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 32/4/1: 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.