Temporary hardness of water is due to of calcium and magnesium and it can be removed by.

sedimentation

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boiling

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sulphates

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bicarbonates

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Solution

The correct options are
B boiling
D bicarbonates
Temporary hardness of water is due to the presence of soluble calcium bicarbonate $(C a$ ( $H C O_{3})_{2})$ and magnesium bicarbonate $(M g$ ( $H C O_{3})_{2})$ .
It is called temporary because it can be easily removed by boiling.

$C a (H C O_{3})_{2} (a q)$ $b o i l - - \to$ $C a C O_{3} (↓)$ + $H_{2} O (l)$ + $C O_{2} (g)$

$M g (H C O_{3})_{2} (a q)$ $b o i l - - \to$ $M g C O_{3} (↓)$ + $H_{2} O (l)$ + $C O_{2} (g)$

On boiling, the bicarbonates of calcium and magnesium form their respective insoluble carbonates. These precipitates are removed by filtration.

Suggest Corrections

Similar questions

Sulphates and chlorides of magnesium and calcium cause temporary hardness of water.

Assertion (A): Temporary hardness of water can be removed by boiling.

Reason (R): Bicarbonates of calcium and magnesium undergo thermal decomposition.

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