Question

A quantity of electricity required to reduce 12.3 g of nitrobenzene to aniline arising $50\%$ current efficiency is:

• A. 1158000C
• B. 579000C
• C. 231600C
• D. 289500C

Answer 1

The correct option is A 1158000C

Equivalent mass of nitrobenzene $=\frac{Molecularmass}{6}$
$=\frac{123}{6}=20.5$
Number of equivalents of nitrobenzene $=\frac{Mass}{equivalentmass}=\frac{123}{20.5}=6$
Amount of charge required $=6\times 96500=579000coulomb$
Amount of charge required when current efficiency is $50\%=2\times 579000$
$=1158000C$