NEETChemistryRedox Reactions
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Permanganate titration are not performed in presence of hydrochloric acid. Reason R : Chlorine is formed as a consequence of oxidation of hydrochloric acid. In the light of the above statements, choose the correct answer from the options given below
Options
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DA is false but R is true
Correct answer
A. Both A and R are true and R is the correct explanation of A
Step-by-step solution
Hydrochloric acid (HCl) is usually not used in the process of titration because it reacts with the indicator potassium permanganate ( KMnO 4 ) that is used in the process. It reacts with KMnO 4 solution and gets oxidized which further results in the liberation of chlorine gas according to the following reaction. 2 KMnO 4 + 16 HCl → 2 MnCl 2 + 2 KCl + 8 H 2 O + 5 Cl 2 So, Both A and R are true and R is the correct explanation of A