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The water which form lather directly with the soap is called __________

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The water which form lather directly with the soap is called __________

(a) Hard water

(b) Soft water

(c) Partially hard water

(d) Very hard water

I got this question during an online interview.

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

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The correct option is (b) Soft water

The explanation is: The water which forms lather directly with the soap is called soft water. The water which forms precipitates when reacted with soap is called as the hard water.

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