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The phosphate is about the range of __________ in drinking water.

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The phosphate is about the range of __________ in drinking water.

(a) 5-10ppm

(b) 10-15ppm

(c) 15-20ppm

(d) 20-25ppm

This question was addressed to me in examination.

This interesting question is from Estimation of Hardness in division Water of Applied Chemistry

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Correct option is (b) 10-15ppm

Easiest explanation: The phosphate is about the range of 10-15ppm in drinking water. The sulphate in drinking water is about 200-400ppm.

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