1.

The presence of gas in water is indicated by:(a) Fizzing sound(b) Foam(c) Bubbles(d) Colour changeThis question was posed to me in homework.My enquiry is from Environmental Engineering topic in portion Other Major Topics in Civil Engineering of Basic Civil Engineering

Answer»

The CORRECT choice is (b) Foam

Best explanation: WATER may be POLLUTED by the presence of some unpleasant gases from INDUSTRIES. They are recognized by the foaming of water.



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