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Equal masses of methane and hydrogen are...

Equal masses of methane and hydrogen are mixed in an empty container at `25^(@)C` . The fraction of the total pressure exerted by hydrogen is :

A

`1//2`

B

`8//9`

C

`1//9`

D

`16//17`

Text Solution

Verified by Experts

The correct Answer is:
B
Let mass of each gas `CH_(4)` and `H_(2) = 16 g`
(Mol. Mass `CH_(4) = 16`, Mol. Mass `H_(2) = 2`)
`n_(CH_(4)) = (16)/(16) = 1, n_(H_(2)) = (16)/(2) = 8`
`:. X_(H_(2)) = 8//9`
`:. P_(H_(2)) = x_(H_(2)) xx P_("Total") = (8//9) xx P_("Total")`
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