JEE Main · 2022 · 26 Jun 2022 · Shift 2 · Hydrogen

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Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to
  1. (A) and ✓ Correct
  2. (B) and
  3. (C) and
  4. (D) and

Answer: (A)

Solution

Temporary hardness in water is caused by dissolved calcium and magnesium hydrogen carbonates. On boiling:





The precipitates of and can be removed by filtration, thus removing temporary hardness.

JEE Main · 2022 · 26 Jun 2022 · Shift 2 · Single correct option

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