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Topic

Heavy metal pollution

Asked 2 times in CSE over 11 years (2012–2023), peaking in 2023.
2
PYQs
1
Exams
2
Years active
2012–2023
Span
2023
Peak
2/2
Answers
📅 Full chronological timeline →

Key insights

  • Most tested in CSE — 2 of 2 PYQs
  • Most asked in 2023
  • Recurs across 2 years (2012–2023)

Across exams

CSE · 2

How the concept evolved

112
123
Long-running — most appearances (1 of 2) predate 2016, and it still returns.

Sample questions

You've seen the pattern — here are a few of the actual PYQs.
CSE2023

Consider the following statements regarding mercury pollution

  1. Gold mining activity is a source of mercury pollution in the world
  2. Coal-based thermal power plants cause mercury pollution
  3. There is no known safe level of exposure to mercury

How many of the above statements are correct?

  1. A Only one
  2. B Only two ✓
  3. C All three
  4. D None
✓ Correct answer: (B)
Environment & Ecology › Pollution & Waste
CSE2012

Lead, ingested or inhaled, is a health hazard. After the addition of lead to petrol has been banned, what still are the sources of lead poisoning?

  1. Smelting units
  2. Pens and pencils
  3. Paints
  4. Hair oils and cosmetics

Select the correct answer using the codes given below :

  1. A 1, 2 and 3 only
  2. B 1 and 3 only ✓
  3. C 2 and 4 only
  4. D 1, 2, 3 and 4
✓ Correct answer: (B)
Environment & Ecology › Pollution & Waste

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