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The total hardness of water is 100ppm as CaCO3 equivalent. What is the type of water?

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in Environmental Engineering by (81.4k points)
The total hardness of water is 100ppm as CaCO3 equivalent. What is the type of water?

(a) Soft

(b) Moderately hard

(c) Hard

(d) Very hard

The question was posed to me during an interview.

Origin of the question is Types of Hardness and Method of their Removal topic in division Water Softening of Environmental Engineering

1 Answer

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Best answer
Correct choice is (b) Moderately hard

To explain: When the total hardness of water is between 50 and 150ppm as CaCO3 equivalent, then the water is moderately hard.

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