The rate of diffusion of a gas (molar mass = $128$) compared to oxygen is:

What volume does a gas occupy at $STP$?

The atomic masses of carbon,nitrogen,and oxygen are $12, 14$,and $16$ respectively. Which of the following pairs of gases will diffuse at the same rate?

$A$ mixture of hydrogen and oxygen contains $40 \%$ hydrogen by mass when the total pressure is $2.2 \, bar$. The partial pressure of hydrogen is $bar$. (Nearest Integer)

On what factors does the stability of the state of matter depend?

At $27^{\circ} C$,a closed vessel contains a mixture of equal weights of helium (mol. wt. = $4$),methane (mol. wt. = $16$) and sulphur dioxide (mol. wt. = $64$). The pressure exerted by the mixture is $210 \ mm$. If the partial pressures of helium,methane and sulphur dioxide are $p_1, p_2$ and $p_3$ respectively,which one of the following is correct?