1.

In the domestic water process, when air is sent during the active sludge, then _________ released.(a) Oxygen(b) Carbondioxide(c) Nitrogen(d) ChlorineI have been asked this question in an online interview.I'm obligated to ask this question of Methods of Reducing Water Pollution topic in chapter Water of Applied Chemistry

Answer»

Correct answer is (b) CARBONDIOXIDE

For explanation I would say: When the air is SENT during the ACTIVE SLUDGE, then the carbondioxide is released in domestic water PROCESS.



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