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The hardness in the ion exchange process is reduced to ___________

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The hardness in the ion exchange process is reduced to ___________

(a) 0-1ppm

(b) 0-2ppm

(c) 0-3ppm

(d) 0-4ppm

The question was asked in a job interview.

I would like to ask this question from Ion Exchange Process in chapter Water of Applied Chemistry

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Correct answer is (b) 0-2ppm

Easy explanation: The hardness of the ion exchange process is reduced to 0 to 2ppm. It is a very effective method to reduce the hardness of the water.

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