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Question

In the given scheme of reactions, 10 moles of A is taken, while reagent B, E and H are taken in excess. Find the moles of G formed.
ReactionYield of reaction(i) 2A+B3C+D20%(ii) 2C+E4F40%(iii) 7H+3F8G50%

A
1.4 mol
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B
3.2 mol
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C
2.8 mol
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D
8.4 mol
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Solution

The correct option is B 3.2 mol
ReactionYield(i) 2A+B3C+D20%(ii) 2C+E4F40%(iii) 7H+3F8G50%
Initially, the number of mol of A present = 10
In reaction (i),
2 mol of A reacts to produce 3 mol of C
10 mol of A will produce = 32×10=15 mol of C
Yield of reaction = 20 % = Actual yieldTheoretical yield×100%
Actual yield obtained = 20100×15 = 3 mol of C
In reaction (ii),
2 mol of C produces 4 mol of F
3 mol of C will produce = 42×3 = 6 moles
Actual yield obtained = 40100×6 = 2.4 mol of F
In reaction (iii),
3 mol of F reacts to produce 8 mol of G
2.4 mol of F will produce = 83×2.4 = 6.4 mol of G
Actual yield obtained = 50100×6.4 = 3.2 mol of G

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