Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Calculate the quantity of electricity that would be required to reduce 12.3 g of nitrobenzene to aniline, if the current efficiency for the process is 50%. If the potential drop across the cell is 3.0 volts, how much energy will be consumed ?
Text Solution
Verified by ExpertsThe correct answer is:
C
Sol. C 6 H 5 NO 2 + 6H + + 6e – ⎯→ C 6 H 5 NH 2 + 2H 2 O
N 3+ + 6e – ⎯→ N 3– ∴ equivalent weight (E) of C 6 H 5 NO 2 = 
= 
Now, w = 
Since, current efficiency is 50 %
∴ i = 
∴ 12.3 = 
∴ i × t (i.e., Q) = 115800 coulomb
Now, energy used = 8 × V
= 115800 × 3 = 347.4 kJ
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