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0.5 moles of gas A and x moles of gas B ...

0.5 moles of gas A and x moles of gas B exert a pressure of 200 Pa in a container of volume `10 m^(3)` at 1000K. Given R is the gas constant in `jk^(-1)` ,x is :

A

`(2R)/(4+R)`

B

`(2R)/(4-R)`

C

`(4+R)/(2R)`

D

`(4-R)/(2R)`

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