Permanent hardness in water cannot be cured by:

Hydrogen

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10/12/2021 11:12 am

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Palak23

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Permanent hardness in water cannot be cured by:

(a) Treatment with washing soda

(b) Boiling

(d) Ion exchange method

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10/12/2021 11:14 am

Reyana09

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Correct answer: (b) Boiling

Explanation:

Only temporary hardness which is due to HCO₃^- (bicarbonate) ions is removed by boiling.

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