JEE Main On 16 April 2018 Question 21
Question: When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-aminophenol produced is _______. [JEE Main 16-4-2018]
Options:
A) $ 10.9g $
B) $ 109.0g $
C) $ 9.81g $
D) 98.1 g
Show Answer
Answer:
Correct Answer: B
Solution:
9.65 ampere current was passed for 1.0 hour (3600 seconds) Number of moles of electrons passed
$ =\frac{IA\times t(s)}{96500}=\frac{96.5A\times 3600s}{96500}=0.36 $
moles 4 moles of electrons will reduce 1 mole of nitrobenzene to p-aminophenol.
0.36 moles of electrons will reduce $ \frac{0.36}{4}=0.09 $ moles of nitrobenzene to p-aminophenol.
p-aminophenol molar mass 109.14 g/mol Mass of p-aminophenol obtained
