1.

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. Which of the following statement is incorrect?

Answer»

Average KINETIC energy per MOLECULE of A is equal to that of B
Root mean SQUARE value of translational VELOCITY of B is four times that of A
Pressure exerted by B is four times that of exerted by A
Number of molecules of B in the cylinder is eight times that of A

Solution :Average K.E. per molecule in A and B = `(3)/(2)kT`
`(v_(rms))_(A)=sqrt((3RT)/(M_(A)))and(v_(rms))_(B)=sqrt((3RT)/(M_(B)))`
No. of mole of `A=(m_(A))/(M_(A))`
No. of mole of `B=(m_(B))/(M_(B))=(m_(A)//2)/(M_(A)//16)=8n_(A)`
Pressure exerted by a gas in the vessel depends on the number of molecules presesnt inside.


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