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JEE Main · 2019 · 09 Jan 2019 · Shift 2 · Environmental Chemistry

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The pH of rain water is approximately
  1. (A)5.6✓ Correct
  2. (B)7.5
  3. (C)7.0
  4. (D)6.5

Answer: (A)

Solution

Even clean, unpolluted rain is mildly acidic, with a pH near . This is because atmospheric dissolves to form a little carbonic acid, . Only when and drive the pH well below this do we call it acid rain.

JEE Main · 2019 · 09 Jan 2019 · Shift 2 · Single correct option

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