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  4. In the following reaction <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/54f52f66fdcf51fd08af05ed05853f12-.png /> The % yield for reaction I is 60% and that of reaction II is 50%. The overall yield of the complete reaction is % [nearest integer]

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Q. In the following reaction
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The % yield for reaction I is 60% and that of reaction II is 50%. The overall yield of the complete reaction is ___% [nearest integer]

JEE MainJEE Main 2022Hydrocarbons

Solution:

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Let initial moles of reactant taken $= n$
Total moles obtained for benzene sulphonic acid $($ with $\%$ yield $=60 \%)=0.6 n$
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Moles of benzene sulphonic acid before reaction II $=0.6 n$
Moles obtained for phenol (with $\%$ yield $=50 \%$ ) $=0.6 \times 0.5 n =0.3 n$
So over all \% yield of complete reaction $=\frac{0.3 n }{ n } \times 100=30$