Chemistry

Problem

Electrolysis of a solution of

\text{MnSO}_4

in aqueous sulphuric acid is a method for the preparation of

\text{MnO}_2

. Passing a current of 27 A for 24 hours gives 1 kg of

\text{MnO}_2

. The current efficiency in this process is: (a) 100% (b) 95.185% (c) 80% (d) 82.951%