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Q.

The following sequence of reaction may be used to extract zinc from its sulphide ore :

ZnS+O2⟶ZnO+SO2ZnO+C⟶Zn+CO

How many tonnes of Zn can be obtained from 10 tonnes of Zns assuming that the yield is 75% ? [Atomic weight of Zn=65,S=32]

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a

12

b

10

c

15

d

5

answer is A.

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Detailed Solution

Mzn=mass of zincmoleculer weightx

mZn=mznsMznsx MZnxη

1097×65×0.75≃5 tonnes

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