NEET Chemistry States Of Matter MCQs

A mixture of 1 mol of He and 1 mol of CO$_2$ is contained in a vessel of volume V at 20°C. If the mixture behaves ideally, what is the pressure exerted by He?

Two vessels are connected by a valve. One contains 10 g of $H_2$ at 27°C and 1 atm. The other contains 16 g of $O_2$ at 27°C and 1 atm. If the valve is opened and the gases mix completely, what is the partial pressure of $H_2$ in the mixture (assuming ideal behavior)?

A container is filled with a mixture of two gases, A (Molar mass = 4 g/mol) and B (Molar mass = 64 g/mol), at a total pressure of 2 atm. If the partial pressure of gas A is 1.5 atm, what is the ratio of the rate of effusion of A to B?

A mixture of 1 mol of He and 0.5 mol of SO2 is held in a container at a constant temperature of 27°C. The partial pressure of He is 2 atm. If the mixture behaves ideally, what is the density of the mixture (g/L) closest to? (Given: R = 0.082 L atm/mol K, Molar mass of He = 4 g/mol, Molar mass of SO2 = 64 g/mol)

A container with a small hole has a mixture of two ideal gases A and B with molecular weights $M_A$ and $M_B$ respectively, where $M_A > M_B$. Initially, the partial pressures are equal. After some time, which gas will have a higher partial pressure inside the container?

A mixture of 2 moles of He and 1 mole of $N_2$ is contained in a 10 L vessel at 27°C. What is the partial pressure of nitrogen?

A container holds 4 g of helium at a pressure of 2 atm and a temperature of 300 K. If 8 g of oxygen is added to the container while maintaining the same volume and temperature, what is the new total pressure?

A mixture of $N_2$ and $O_2$ gases has a total pressure of 1.2 atm. If the partial pressure of $N_2$ is 0.8 atm and the volume of the container is halved while maintaining a constant temperature, what will be the new partial pressure of $O_2$?

Two flasks, A and B, of equal volume are connected by a narrow tube of negligible volume. Flask A contains $CO_2$ at 1 atm, while flask B contains $N_2$ at 2 atm. If the stopcock connecting the flasks is opened, and the gases are allowed to mix at constant temperature, what is the partial pressure of $CO_2$ in the final mixture?

A mixture of gases contains 4 moles of $O_2$, 2 moles of $N_2$, and 1 mole of $CO_2$ at a total pressure of 2 atm. What is the mole fraction of $N_2$ and its partial pressure?