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Question

Equal weights of ethane and hydrogen are mixed in an empty container 25C. The fraction of the total pressure exerted by hydrogen is

A
1:2
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B
1:1
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C
1:16
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D
15:16
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Solution

The correct option is D 15:16
Let 30g of both be mixed.

Moles of H2=302=15

Moles of C2H6=3030=1
Mole fraction of H2=151+15=1516
which is also the fraction of total pressure executed by H2.

So, the correct option is D

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