Question

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

• A. 115800 C
• B. 57900 C
• C. 23160 C
• D. 28950 C

Answer 1

Answer: (A)

Molar mass of nitrobenzene = 123 Equivalent mass of nitrobenzene

$\text{=}\frac{\text{Molecular}\text{mass}}{\text{6}}$

$=\frac{123}{6}=20.5$

Number of equivalents of nitrobenzene

$\text{=}\frac{\text{Mass}}{\text{Equivalent}\text{mass}}$

$=\frac{12.3}{20.5}=0.6$

Amount of charge required $=0.6\times 96500=57900$ Coulomb

Amount of charge required when current efficiency is 50%

$=2\times 57900$

$\text{=}\text{115800}\text{C}$