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The permanent hardness is also known as __________

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in Environmental Engineering by (81.4k points)
The permanent hardness is also known as __________

(a) Pseudo hardness

(b) Non carbonate hardness

(c) Carbonate hardness

(d) Brinell hardness

The question was asked by my school teacher while I was bunking the class.

I'm obligated to ask this question of Types of Hardness and Method of their Removal topic in division Water Softening of Environmental Engineering

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Correct choice is (b) Non carbonate hardness

For explanation I would say: The permanent hardness is also known as non carbonate hardness whereas temporary hardness is also known as carbonate hardness.

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