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🩺 NEET🧪 Chemistry

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

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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

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