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JEE Main 202622 JanuaryEvening Shift
Exam
JEE Main
Year
2026
Date
22 January
Shift
Evening Shift
Subject
Chemistry
Chapter
Amines

JEE Main 2026 · 22 January · Evening Shift · Chemistry · Amines

The mass of benzanilide obtained from the benzoylation reaction of...

The mass of benzanilide obtained from the benzoylation reaction of 5.8 g of aniline, if yield of product is 82%82 \%, is ____\_\_\_\_ g (nearest integer). (Given molar mass in gmol−1H:1,C:12, N:14,O:16\mathrm{g} \mathrm{mol}^{-1} \mathrm{H}: 1, \mathrm{C}: 12, \mathrm{~N}: 14, \mathrm{O}: 16)

Correct answer

0

Step-by-step solution

Benzoylation of aniline:
C6H5NH2+C6H5COCl→C6H5CONHC6H5+HClC_6H_5NH_2 + C_6H_5COCl \rightarrow C_6H_5CONHC_6H_5 + HCl

Molar mass of aniline:
M=6(12)+7(1)+14=93M = 6(12) + 7(1) + 14 = 93 g/mol

Moles of aniline:
n=5.893=0.0624n = \frac{5.8}{93} = 0.0624 mol

Molar mass of benzanilide (C13H11NOC_{13}H_{11}NO):
M=13(12)+11(1)+14+16=197M = 13(12) + 11(1) + 14 + 16 = 197 g/mol

Theoretical mass of benzanilide:
mtheoretical=0.0624×197=12.29m_{theoretical} = 0.0624 \times 197 = 12.29 g

Actual mass with 82% yield:
mactual=12.29×0.82=10.08≈10m_{actual} = 12.29 \times 0.82 = 10.08 \approx 10 g
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