When the temperature of a gas is increased from $$30^{\circ} \mathrm{C}$$ to $$930^{\circ} \mathrm{C}$$, the root mean square speed of the gas would

Three flasks of equal volume contain $$\mathrm{CH}_4, \mathrm{CO}_2$$ and $$\mathrm{Cl}_2$$ gases respectively. They will contain equal number of molecules, if

If the volume of $$15.9 \mathrm{~g}$$ of carbon tetrachloride is $$10 \mathrm{~mL}$$, calculate its density.

$$0.63 \mathrm{~g}$$ of oxalic acid is dissolved in order to obtain $$250 \mathrm{~cm}^3$$ of its solution. Find the normality of this solution. [oxalic acid $$\left.(\mathrm{COOH})_2 \cdot 2 \mathrm{H}_2 \mathrm{O}\right]$$