The kinetic energy of an ideal gas depends upon its:

Which of the following statement$(s)$ is/are true?

The mass of molecule $A$ is half the mass of molecule $B$. The $rms$ speed of $A$ is twice the $rms$ speed of $B$. If two samples of $A$ and $B$ contain the same number of molecules and are taken in two separate containers of equal volume,what will be the ratio of the pressure of $A$ to the pressure of $B$ $(P_A/P_B)$?

Assertion : All molecules in a gas have same speed.
Reason : Gas contains molecules of different size and shape.

What is the temperature at which the kinetic energy of $0.3 \ mol$ of helium is equal to the kinetic energy of $0.4 \ mol$ of argon at $400 \ K$ (in $K$)?

For a gas,the ratio $C_p/C_v$ is $1.3$ and its atomic mass is $M$. What is the molecular mass of the gas?