JEE MAIN - Chemistry (2022 - 27th July Morning Shift - No. 23)
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]
Answer
30
Explanation
_27th_July_Morning_Shift_en_23_2.png)
Let initial moles of reactant taken = n
Total moles obtained for benzene sulphonic acid (with % yield = 60%) = 0.6n
_27th_July_Morning_Shift_en_23_3.png)
Moles of benzene sulphonic acid before reaction II = 0.6n
Moles obtained for phenol (with % yield = 50%) = 0.6 × 0.5n = 0.3n
So over all % yield of complete reaction $=\frac{0.3 \mathrm{n}}{\mathrm{n}} \times 100=30$
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