Question

Chlorine is a chemical that is widely used in the treatment of pools. It eliminates bacteria and algae by disinfecting & oxidizes other agents like dirt. When chlorine is added to a pool, a reaction occurs in which a weak acid called hypochlorous acid is produced.
Chlorinated pools are usually treated with a chemical called Calcium hypochlorite, Ca(ClO)2.
Pure chlorine (Cl2) is not used for all the reasons below EXCEPT ONE. Which one?
A) it is highly toxic
B) it has a putrid odor
C) it is a noble gas and therefore not reactive
D) it is a gas and therefore difficult to handle

Answer 1

Correct answer is C.

Explanation: Chlorine is the 17th element in the periodic table that has an electronic configuration of $[Ne]3s^23p^5$ which has 1 electron less than the stable [Ar] gas and is very reactive in nature.

Chlorine element is present in the form of gas that has a pungent odor and is highly toxic in nature.

Option A, B and D are the ones which shows the actual property of the Chlorine, why we do not use pure chlorine but Option C is the only option that does not show the correct property of pure chlorine.