Question

Why is chlorine bubbled through water during the latter’s treatment?

(a) To remove foul odor

(b) To kill microorganisms

(c) To improve taste

(d) To remove hardness

I had been asked this question during an interview for a job.

Origin of the question is P-Block Elements topic in section P-Block Elements of Chemistry – Class 12

Answer 1

Correct answer is (b) To kill microorganisms

The best explanation: Chlorine is a very popular disinfecting agent and is widely used in containers to kill microorganisms. In water treatment plants, chlorine gas may be bubbled through to remove trace quantities of microorganisms.