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The BOD value of the domestic sewage is about __________

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The BOD value of the domestic sewage is about __________

(a) 160

(b) 161

(c) 166

(d) 168

I had been asked this question in class test.

This intriguing question comes from Methods of Reducing Water Pollution topic in portion Water of Applied Chemistry

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Correct choice is (c) 166

To explain I would say: The BOD value of domestic sewage is about 166ppm. Total quantity of organic matter utilised is called as the BOD.

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