The temporary hardness of water due to calcium bicarbonate can be removed by adding:

C a C O_{3}

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C a (O H)_{2}

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C a C l_{2}

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H C l

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Solution

The correct option is B $C a (O H)_{2}$
The reason for temporary hardness is the presence of bicarbonates of $C a$ and $M g$ in water.
To remove this temporary hardness, we have to use the agents that can precipitate out the bicarbonates in an easy-to-filter-out form.

$C a (H C O_{3})_{2} + C a (O H)_{2} ⟶ 2 C a C O_{3} ↓ + 2 H_{2} O$

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Which of the following compound is formed during the removal of temporary hardness of water containing calcium bicarbonate through boiling?

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