NEET Chemistry States Of Matter MCQs

A mixture of $N_2$ and an unknown gas X effuses through a porous barrier in 5 minutes and 7 minutes respectively under identical conditions. If the molar mass of $N_2$ is 28 g/mol, what is the most likely identity of gas X given the following options?

At a given temperature, gas A effuses twice as fast as gas B. If the density of gas A is 0.2 g/L, what is the density of gas B under the same conditions?

Two gases, A and B, have molar masses of 16 g/mol and 64 g/mol respectively. If gas A takes 20 seconds to effuse through a small opening, how long will gas B take to effuse under the same conditions?

A porous barrier separates two chambers containing equal volumes of $He$ and $CH_4$ at the same temperature and pressure. After a certain time, it's observed that 1/4 of the $He$ has effused. Approximately what fraction of the $CH_4$ has effused during the same time?

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 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 gas effuses through a small orifice at a rate r. If the temperature is quadrupled and the molar mass is halved, what is the new effusion rate?

Two gases, A and B, have molar masses of 4 g/mol and 64 g/mol respectively. If gas A effuses at a rate of 0.2 mol/s, what is the approximate effusion rate of gas B under the same conditions?

A sample of unknown gas effuses at a rate that is 0.707 times the rate of effusion of oxygen gas. What is the approximate molar mass of the unknown gas?

Which of the following pairs of gases would have the largest difference in their rates of effusion?