According to kinetic theory of gases, which one of the following statements is incorrect?

Which of the following statements is not in accordance with kinetic theory of gases?

Which of the following laws is not derivable from kinetic theory of gases?

The product of the pressure and volume of an ideal gas is:

In the equation $\frac{PV}{4}=RT,V$ represents

Half a mole of helium at $27^{\circ} \mathrm{C}$ and at a pressure of $2$ atmosphere is mixed with $1.5$ mole of $\mathrm{N}_{2}$ at $77^{\circ} \mathrm{C}$ 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 $69^{\circ} \mathrm{C},$ then its pressure, in atmospheres, is

At pressure $P$ and absolute temperature $T,$ a mass $M$ of an ideal gas fills a closed container of volume V. An additional mass $2M$ of the same gas is introduced into the container and the volume is then reduced to $\frac{V}{3}$ and the temperature to $\frac{\mathrm{T}}{3} .$ The pressure of the gas will now be