Question

Electrolysis of a solution of MnSO4 in aqueous sulphuric acid is a method for the preparation of MnO2. Passing a current of 27A for 24 hours gives 1kg of MnO2. The current efficiency in this process is :

• A. 100%
• B. 95.185%
• C. 80%
• D. 82.951%

Answer 1

Answer: (B)

95.185%

Answer 2

$\frac{1000 \times 2}{(55 + 32)} = \frac{27 \times 24 \times 3600 \times \eta}{96500}or\eta = 0.951 = 95.1\%$