Questions in Kinetic Theory of Gases

Select	Question
	For a gas, the r.m.s. speed at 800 K is
	The root mean square velocity of a gas molecule of mass $m$ at a given temperature is proportional to
	A sample of gas is at 0°C. To what temperature it must be raised in order to double the r.m.s. speed of the molecule
	A gas is allowed to expand isothermally. The root mean square velocity of the molecules
	The temperature at which the root mean square velocity of a molecule will be doubled than at 100°C
	At room temperature, the r.m.s. speed of the molecules of certain diatomic gas is found to be 1930 m/s. The gas is
	Moon has no atmosphere because
	Speed of sound in a gas is $v$ and r.m.s. velocity of the gas molecules is $c$. The ratio of $v$ to $c$ is
	The molecules of a given mass of a gas have a r.m.s. velocity of 200 m/sec at 27°C and $1.0\times {{10}^{5}}\,N/{{m}^{2}}$ pressure. When the temperature is 127°C and pressure is $0.5\times {{10}^{5}}\,N/{{m}^{2}}$, the r.m.s. velocity in m/sec will be
	Which of the following statement is true