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The presence of metallic compounds in water _______ the efficiency of chlorine.

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The presence of metallic compounds in water _______ the efficiency of chlorine.

(a) Decreases

(b) Increases

(c) Slightly decreases

(d) Remains constant

I have been asked this question during an online interview.

Asked question is from Factors Affecting Chlorination topic in section Properties of Disinfection of Environmental Engineering

1 Answer

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Best answer
Correct choice is (a) Decreases

Explanation: The presence of metallic compounds like iron and manganese utilized a large amount of chlorine and decrease the efficiency of chlorine for disinfection.

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