Of all the three common mineral acids, only sulphuric acid is found to be suitable for making the solution acidic because :

Options

A. It does not react with `KMnO_4` or the reducing agent
B. Hydrochloric acid reacts with `KMnO_4`
C. Nitric acid is an oxidising agent which reacts with reducing agent
D. All of the above are correct

Answer

D

Explanation

Under the titration conditions, sulphuric acid does notwith `KMnO_4` or reducing agent HCl may be consumed by some `KMnO_4` in the reaction giving inaccurate volume result. `HNO_3` reacts with reducing agent itself and therefore can not be used for titration.