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The temporary hardness in water is due to the presence of __________

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in Environmental Engineering by (81.4k points)
The temporary hardness in water is due to the presence of __________

(a) Sulfates, Chlorides

(b) Sulfates, Chlorides, nitrates

(c) Carbonates and bicarbonates

(d) Sulfates and carbonates

This question was posed to me during an interview.

Question is from Types of Hardness and Method of their Removal topic in division Water Softening of Environmental Engineering

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Right option is (c) Carbonates and bicarbonates

For explanation I would say: The temporary hardness is due to the presence of carbonates and bicarbonates of calcium and magnesium in water.

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