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In _____________ when the eater is heated then the soluble salts turns into insoluble ones and removed by filtration.

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In _____________ when the eater is heated then the soluble salts turns into insoluble ones and removed by filtration.

(a) Temporary hardness

(b) Permanent hardness

(c) Non-carbonate

(d) Non-alkaline

I have been asked this question in an online interview.

I need to ask this question from Estimation of Hardness in section Water of Applied Chemistry

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The correct answer is (a) Temporary hardness

The best I can explain: The hardness in the temporary hard water can be removed by heating and filtrating the insoluble salts.

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