States of matter practice · Mixed difficulty

When an ideal gas undergoes unrestricted expansion, no cooling takes place because the molecules:

Same mass of ${CH}_4$ and ${H}_2$ is taken in container, The partial pressure caused by ${H}_2$ is

A closed vessel contains equal number of oxygen and hydrogen molecules at a total pressure of 740 mm. If oxygen is removed from the system, the pressure:

A 4 : 1 mixture of helium and methane is contained in a vessel at 10 bar pressure. Due to a hole in the vessel, the gas mixture leaks out. The composition of mixture effusing out initially is

Dalton’s law of partial pressure will not apply to which of the following mixture of gases

What is the reason for unusual high b.p. of water?

Introduction of absolute scale of thermometry is the result of:

The critical temperature of a gas is related to van der Waal’s constants as

Statement I: Second virial coefficient of $\mathrm{CO}_2$ is $-0.065 \mathrm{~L} \mathrm{~mol}^{-1}$ at $400 \mathrm{~K}$ and $30 \mathrm{~atm}$ making $\mathrm{CO}_2$ more compressible than an ideal gas.

Statement II: Compressibility factor of $\mathrm{CO}_2(Z=0.941)$ is less than 1 ( $Z=1$ for ideal gas) due to the attractive forces between $\mathrm{CO}_2$ molecules.

Assuming that air is $79 \%$ by mole of $\mathrm{N}_2, 20$ mole $\% \mathrm{O}_2$ and $1 \% \mathrm{Ar}$, the density of air at $25^{\circ} \mathrm{C}$ and $1 \mathrm{~atm}$ is

Which of the following gases occupies maximum volume at STP

The value of Vander Waal’s constant (a) is minimum for

Maximum deviation from ideal gas is expected from

Statement I: Reduced equation of state in terms of reduce: temperature $\theta$, reduced volume $\phi$ and reduced pressure x can be applied to solid, gases and liquid.

Statement II: $\left(\pi+\frac{3}{\phi^2}\right)(3 \phi-1)=8 \theta$. Equation is independent of $p, V$ and $T$ as well as independent of vander Waals' constant $a$ and $b$.

Kelvin’s thermodynamic scale of temperature is
based on

Gas equation $pV = nRT$ is obeyed by ideal gas in

The ratio of average speed of an oxygen molecule to the rms speed of a nitrogen molecule at the same temperature is

The speed possessed by majority of gaseous molecules is

1.0 L of ${N_2}$ and 7/8 L of ${O_2}$ at the same temperature and pressure were mixed together. What is the relation between the masses of the two gases in the mixture?

At a constant temperature what should be the percentage increase in pressure for a $5 \%$ decrease in the volume of gas:

At what temperature is the rms speed of hydrogen molecules the same as that of oxygen molecules at $1327\,\,^\circ C$ ?

The temperature, at which a gas shows maximum ideal behaviour, is known as

In what ratio by mass, the gases $CO$ and 2 butene $(C_4H_8)$ be mixed in a vessel so that they cause same partial pressures?

6.4 g of $S{O_2}$ at ${0^0}C$ and 0.99 atm pressure occupies a volume of 2.241 L. Predict which of the following is correct?

Given below are two statement: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) $S{O_2}(g)$ is adsorbed to a large extent than ${H_2}(g)$ on activated charcoal.
Reason (R) $S{O_2}(g)$ has a higher critical temperature than ${H_2}(g)$
In the light of the above statements, choose the most appropriate answer from the options given below

S-I: Rate of diffusion of $\mathrm{CO}_2$ is more than that $\mathrm{O}_3$.

S-II: Vapour density of $\mathrm{O}_3$ is more than that of $\mathrm{CO}_2$.

0.5 mole of each of ${\mathrm{H}_2},\mathrm{S}{\mathrm{O}_2}$ and $\mathrm{C}{\mathrm{H}_4}$ are kept in a container. A hole was made in the container. After 3 h, the order of partial pressures in the container will be

Most probable speed, average speed and RMS speed are related as:

The units of the Vander Waal’s constant ‘b’ are

When a capillary tube of diameter 0.8 mm is dipped in a liquid having density $800\,\,kg\,\,{m^{ - 3}}$, then the height of liquid in the capillary tube rises to 4 cm. The surface tension of liquid is $\left( {\mathrm{g} = 9.8\mathrm{m}/{\mathrm{s}^2}} \right)$