🩺 NEET🧪 Chemistry

Environmental Chemistry

3 NEET Chemistry previous year questions on Environmental Chemistry — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW

Which of the following statement is NOT true about acid rain?

a

Its \(\mathrm{pH}\) is less than 5.6

b

It is due to reaction of \(\mathrm{SO}_2, \mathrm{NO}_2\) and \(\mathrm{CO}_2\) with rain water

c

Causes no damage to monuments like Taj Mahal

d

It is harmful for plants

✓ Correct answer: c)

Causes no damage to monuments like Taj Mahal

ExplanationExplanation:
  • Acid rain has a pH less than 5.6, so (A) is true.
  • It is mainly caused by SO₂ and NOₓ (nitrogen oxides) reacting with rainwater to form sulphuric acid (H₂SO₄) and nitric acid (HNO₃). CO₂ forms weak carbonic acid and contributes to the natural acidity of rain. Hence, (B) is considered true in this context.
  • Acid rain damages marble monuments such as the Taj Mahal, causing corrosion known as "Marble Cancer." Therefore, statement (C) is false.
  • Acid rain is harmful to plants, aquatic life, and soil fertility, so (D) is true.
Therefore, the statement that is NOT true is:

(C) Causes no damage to monuments like Taj Mahal

Q2

Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

a

\( \mathrm{N}_{2} \mathrm{O}_{5} \)

b

\( \mathrm{NO}_{2} \)

c

\( \mathrm{N}_{2} \mathrm{O} \)

d

\( \mathrm{NO} \)

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Q3

The gas released during anaerobic degradation of vegetation may lead to :

[JEE Main 2021, 24 Feb (Shift 1)]

a

Corrosion metals

b

Ozone hole

c

Global warming and cancer

d

Acid rain

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