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MHT CET Physics question

PhysicsKinetic Theory of GasesMHT CET

Half a mole of helium at 27°C and at a pressure of 2 atmosphere is mixed with 1.5 mole of at 77°C and at a pressure of 5 atmosphere so that the volume of the mixture is equal to the sum of their initial volumes. If the temperature of the mixture is 69°C, then its pressure, in atmospheres, is

Answer: (B)

Solution

Initial volumes: and , so ; then

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Question ID VK-063340