The temporary hardness of water is due to:

Question:

The temporary hardness of water is due to:

  1.  $\mathrm{Na}_{2} \mathrm{SO}_{4}$

  2. $\mathrm{NaCl}$

  3. $\mathrm{Ca}\left(\mathrm{HCO}_{3}\right)_{2}$

  4.  $\mathrm{CaCl}_{2}$

Correct Option: , 3

Solution:

Unly bicarbonates cause temporary hardness, whereas chlorides and sulphates cause permanent hardness.

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