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JIPMER2006ChemistryHydrogen

Hardness of water is due to presence of salts of :

Options

  1. ANa ⁺ and K ⁺
  2. BCa ²⁺ and Mg ²⁺
  3. CCa ²⁺ and K ⁺
  4. DCa ²⁺ and Na ⁺

Correct answer

B. Ca ²⁺ and Mg ²⁺

Step-by-step solution

Hardness of H ₂ O is due to the presence of bicarbonates, chlorides, and sulphates of Ca and Mg ions.

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