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The alkalinity due to hydroxide ion when P > M/2 will be ____________

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The alkalinity due to hydroxide ion when P > M/2 will be ____________

(a) M-2P

(b) 2(M-P)

(c) Nil

(d) 2P-M

I had been asked this question in an interview for job.

The query is from Alkalinity of Water and its Estimation topic in portion Water and its Treatment of Engineering Chemistry II

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Correct choice is (d) 2P-M

Explanation: The alkalinity due to hydroxide ion when P > M/2 will be (2P-M).

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