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How can the industrial… (Class 10 Social Science 2023, Q31a)

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Social ScienceCBSE Class 10 · Board exam 2023, set 32/6/1 · 5 marks · Long answer

CBSE Class 10 Social Science 2023: question 31(a)

Set in the CBSE Class 10 board exam of 2023, paper 32/6/1, 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 answerWater Resources

How can the industrial pollution of fresh water be reduced? Explain with examples.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 32/6/1.

Hints

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

Hint 1

How can the same water be used more than once?

Hint 2

What must be done to waste water before it enters a river?

Hint 3

Think of legal control over groundwater use.

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

    1 mark

  2. Harvest rainwater to meet water needs, lessening dependence on rivers and groundwater.

    1 mark

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

    1 mark

  4. Treat effluents in three phases: primary (mechanical: screening, grinding, sedimentation), secondary (biological) and tertiary (biological, chemical and physical, including recycling).

    1 mark

  5. Regulate overdrawing of groundwater by industry legally, and integrate economic development with environmental concerns.

    1 mark

Answer: Recycle and reuse water, harvest rain, treat effluents in three phases, and legally control groundwater overdrawing.

Where the marks are

  • Reuse and recycling of water (1 mark)
  • Rainwater harvesting (1 mark)
  • Treating hot water and effluents before release (1 mark)
  • Three phases of treatment (1 mark)
  • Legal regulation of groundwater use (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 paper2023 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.