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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoKTGMedium2 minQB

PhysicsMediummultiple choice

A closed vessel contains a mixture of two diatomic gases A and B. Molar mass of A is 16 times that of B and mass of gas A contained in the vessel is 2 times that of B.

Options:(select one or more)

Answer:

A, B, C, D

Solution:

$M_{A} = 16 M_{B}, m_{A} = 2 m_{B} \Rightarrow n_{B} = 8 n_{A}$ , so B has 8 times the molecules (D) and exerts 8 times the pressure (C). Same T: average KE per molecule equal (A); $v_{r m s} \propto 1/ M \Rightarrow v_{B} = 4 v_{A}$ (B). [No key printed in source; derived.]

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:KTG

⏱ 2mℹ️ Source: QB

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