Question

Assetion : Permanganate titrations is not carried out in presence of hydrochloric acid.
Reason : Hydrochloric acid is oxidised to chlorine.
A. If both assetion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are ture but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer 1

Correct Answer - A
Permanganate tirations is not carried out in presenece of `HC1` because it may oxidise some of the `HC1` to `C1_(2)` gas according to the following chemical reaction, `2MnO_(4)^(-) + 16H^(+) + 10 C1^(-) rarr 2Mn^(2+) + 8H_(2)O + 5C1_(2)`. Hence we do not get the correct end point for the given titration.