Question

Which of the following substances cause permanent hardness of water?

A

B

C

D

All of the above

Medium

Solution

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Correct option is A)

Permanent hardness is caused by dissolved chloride, sulfate, and nitrates of Calcium & magnesium (which are not removed by boiling) and temporary hardness is caused by dissolved calcium hydrogen carbonate (which is removed by boiling).

Hence, the correct option is

Solve any question of Hydrogen with:-

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