JEE Main 202118 MarchEvening Shift

Exam: JEE Main
Year: 2021
Date: 18 March
Shift: Evening Shift
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

JEE Main 2021 · 18 March · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

Consider the above reaction where 6 . 1g of benzoic acid is used to...

Consider the above reaction where 6 . 1g of benzoic acid is used to get 7 . 8g of m-bromo benzoic acid. The percentage

Consider the above reaction where $6 . 1g$ of benzoic acid is used to get $7 . 8g$ of m-bromo benzoic acid. The percentage yield of the product is ___ .

(Round off to the Nearest integer)

[Given : Atomic masses : $C = 12 . 0u, H: 1 . 0u, O: 16 . 0u, Br = 80 . 0u$ ]

Correct answer

Step-by-step solution

Moles of Benzoic acid $= \dfrac{6 . 1}{122}$

= moles of m-bromobenzoic acid

So, weight of m-bromobenzoic acid

$= \dfrac{6 . 1}{122} \times 201gm$

$= 10 . 05gm$

$%$ yield $= \dfrac{Actualweight}{Theoreticalweight} \times 100$

$= \dfrac{7 . 8}{10 . 05} \times 100$

$= 77 . 61 %$

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