List of top Chemistry Questions on Gaseous State

At \(T(K)\), the rms velocity of an ideal gas is \(x\,\text{m s}^{-1}\). At what temperature (in K), the rms velocity becomes \(3x\,\text{m s}^{-1}\)?

At 300 K, one mole of a gas present in a 10 L flask exerted a pressure of 2.71 atm. What is its compressibility factor? \((R=0.082~L~atm~mol^{-1}K^{-1})\)

For a fixed amount of an ideal gas, its pressure is measured as a function of volume at three different temperatures ($T_1, T_2, T_3$). What is the correct order of temperatures? figure [H]

figure

The value of the gas constant $R$ in $\text{J K}^{-1}\text{ mol}^{-1}$ is

Which of the following pairs of gases contains the same number of molecules?

A balloon filled with an air sample occupies 3 L volume at 35 °C. On lowering the temperature to T, the volume decreases to 2.5 L. The temperature T is [Assume P constant]

Sum of molar mass of gas $(x) & (y)$ is :

100 mL of a hydrocarbon is mixed with 360 mL of oxygen and ignited. After combustion, the gaseous mixture has a volume of 280 mL at NTP. After passing through KOH, 80 mL of gas remains. The hydrocarbon is:

The fraction of molecules of a gas possessing velocities in a given range, as given by the Maxwell-Boltzmann distribution, depends on:

The compressibility factor (\(Z = \dfrac{PV}{nRT}\)) for an ideal gas is:

Mean velocity, most probable velocity and root mean square velocity of gas molecules are approximately in the ratio:

Identify a molecule having highest number of lone pair of electrons in valence shell of central atom.

What is vapour density of \(\text{O}_2\) gas?

Which among the following has lowest boiling point?

The unit of van der Waals constant ‘a’ is

The expression of average speed (u avg) of molecules of a gas is given by

20 mL of gas \(A\) and 10 mL of gas \(B\) diffuse through a porous membrane separately in 1 minute. If the vapor density of \(B\) is \(X\), what is the vapor density of \(A\)?

The ratio of rate of diffusion of \(SO_2\) to \(CH_4\) is:

The ratio of rates of diffusion of Helium (\(He\)) to Hydrogen (\(H_2\)) is:

If two gases \(CH_4\) and \(SO_2\), are allowed to enter from the two ends of a 1 km long vacuum tube at the same time, where will the gases meet from the \(CH_4\) end?

Find the false statement for ideal gases.

What is the volume (in $\text{dm}^3$) occupied by 75 g ethane at S.T.P. ?

What is the volume occupied by 16 g methane gas at STP?