The temporary hardness of water is due to the presence of:

Magnesium bicarbonate

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Calcium chloride

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Magnesium sulphate

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Calcium carbonate

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Solution

The correct option is A Magnesium bicarbonate
The temporary hardness of water is due to the presence of calcium and magnesium hydrogen carbonates. It can be removed by boiling.
The presence of calcium chloride, calcium carbonate, and magnesium sulphate causes permanent hardness.

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Permanent hardness is caused by the dissolved __(sulphates/bicarbonates) of calcium and magnesium.

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