Redox Reactions And Electrochemistry Ques 585
Question: In electrolytic reduction of a nitroarene with 50% current efficiency 20.50 g of the compound is reduced by $ 2\times 96500C $ of electric charge. The molar mass of the compound is
Options:
A) 123.0 g
B) 61.5 g
C) 10.2 g
D) 20.5 g
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ ArNO_2+6{H^{+}}+6{e^{-}}\xrightarrow{{}}ArNH_2+2H_2O $ $ W=\frac{E.wt\times Q}{96500};20.50=\frac{M}{6}\times \frac{2\times 96500}{96500}\times \frac{50}{100} $
$ \therefore M=123.0g $
