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The presence of which of the following in sewage indicates nitrogen content before decomposition of sewage?

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The presence of which of the following in sewage indicates nitrogen content before decomposition of sewage?

(a) Nitrites

(b) Nitrates

(c) Free ammonia

(d) Albuminoid nitrogen

This question was posed to me during an internship interview.

This question is from Chemical Characteristics of Waste Water in portion Wastewater Characteristics of Environmental Engineering

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Best answer
Right answer is (d) Albuminoid nitrogen

The best explanation: The presence of Albuminoid nitrogen in water indicates the decomposition of sewage has not taken place.It nitrogen is also called as organic nitrogen.

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