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Equal masses of methane and oxygen are mixed in an empty container at 25°C.

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Equal masses of methane and oxygen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by oxygen is

(a) 1/2 

(b) 2/3

(c) (1/3) x (273/298)

(d) 1/3.

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(d) : Let the mass of methane and oxygen be m gm.

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