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What is the most efficient method to get water with zero degrees hardness?

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in Chemistry – Class 11 by (148k points)
What is the most efficient method to get water with zero degrees hardness?

(a) Electrolysis

(b) Permutit process

(c) Synthetic resins

(d) Calgon process

I have been asked this question in a national level competition.

Origin of the question is Hydrogen in chapter Hydrogen of Chemistry – Class 11

1 Answer

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Best answer
Correct choice is (b) Permutit process

The explanation: Permutit is hydrated sodium aluminum silicate, it exchanges it’s sodium ions for divalent ions of calcium and magnesium, permutit when fully exhausted can be regenerated by treating with 10% of sodium chloride solution. It is the most efficient method to get water with zero degrees of hardness.

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