In the formation reaction of NH3from N2and H2, 140g of N2and 40 g H2were mixed. Select the option(s) which is are not correct.A) Maximum mass of NH3which can be formed is 180 g.B) If % yield of reaction is 80%, then H2consumed will be 32 g.C) Some N2(g) will be left after the reaction.D) If NH3formed is 85 g then % yield will be 50%.
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Correct option is
C
56g of N
2
+10g of H
2
N
2
(g)+3H
2
(g)→2NH
3
(g)
In the given reaction, 1 mol of N
2
reequires 3 moles of H
2
for the formation fo ammonia.
Thus if the number of moles of N
2
and H
2
should be in ratio 1:3.
We know,
n=
molecular weight
weight
Thus in option C 56g of N
2
means 2 moles of N
2
and 10g of H
2
means 5 moles of H
2
.
Thus here H
2
acts as limiting reagent.
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