Graham's law of diffusion and effusion

34 questions on Graham's law of diffusion and effusion from the Gaseous State: Ideal Gases chapter: 5 NEET level, 15 JEE Main, 14 JEE Advanced. Each one opens with its answer and solution.

• Under identical conditions of temperature and pressure, the ratio of the rates of diffusion of He (molar mass 4) and CH4 (molar mass 16) is NEET level
• A gas X diffuses through a porous plug 1.5 times faster than SO2 (molar mass 64) under identical conditions. The molar mass of X is nearest to JEE Main level
• The time taken for a certain volume of gas A to effuse through a pinhole is t. The same volume of gas B takes 2t under identical conditions. If the molar mass o... JEE Main level
• A fixed volume of He (molar mass 4) effuses through a small hole in 40 s. The time in seconds (one decimal) for the same volume of O2 (molar mass 32) to effuse ... JEE Main level
• Which of the following statements about Graham's law are correct? JEE Main level
• A mixture of H2 and D2 (molar masses 2 and 4) with mole ratio 1 : 1 is allowed to effuse through a pinhole. The composition (mole ratio H2 : D2) of the gas that... JEE Advanced level
• An equimolar mixture of He (molar mass 4) and CH4 (molar mass 16) effuses through a pinhole. In the initial stage, when the composition inside has not changed a... JEE Advanced level
• Two gases A and B have molar masses M_A and M_B with M_A < M_B. Which of the following are correct? JEE Advanced level
• Which gas diffuses most slowly under identical conditions? NEET level
• 50 mL of O2 effuses through a porous plug in 20 s. Under the same conditions, the volume of H2 effusing in 20 s is JEE Main level
• Which of the following mixtures would be hardest to separate by gaseous diffusion? JEE Main level
• Under identical conditions a gas X diffuses at 0.40 times the rate of CH4 (molar mass 16). The molar mass of X in g mol^-1 (one decimal) is JEE Main level
• A bulb contains O2 at pressure P. The time taken for the pressure to fall to P/2 by effusion is t_1. If the bulb instead contains H2 at the same initial pressur... JEE Advanced level
• A fixed volume of pure N2 (molar mass 28) effuses through a pinhole in 60.0 s. The same volume of a mixture of N2 and O2 (molar mass 32) effuses in 63.0 s under... JEE Advanced level
• Which of the following correctly describe gaseous diffusion or effusion? JEE Advanced level
• Graham's law of diffusion states that at constant temperature and pressure the rate of diffusion of a gas is NEET level
• A balloon filled with which gas will deflate fastest through the same tiny pores, at the same temperature and pressure? NEET level
• Equal volumes of H2 and O2 are placed at the two ends of a tube of length 90 cm at the same instant. If the gases diffuse toward each other with rates given by ... JEE Main level
• NH3 (17) and HCl (36.5) are introduced simultaneously at the two ends of a 1.0 m long tube. White fumes of NH4Cl first appear nearer to JEE Main level
• The rate of effusion of a gas is doubled when, at constant volume and temperature, JEE Main level
• A certain volume of CH4 (molar mass 16) effuses through a hole in 50 s. The time in seconds (nearest integer) for the same volume of He (molar mass 4) to effuse... JEE Main level
• A gas X effuses at one fourth the rate of H2 (molar mass 2) under identical conditions. The molar mass of X in g mol^-1 (nearest integer) is JEE Main level
• A gaseous mixture of H2 and O2 with H2 mole fraction 0.20 effuses through a small hole. The mole fraction of H2 in the gas that effuses out initially is JEE Advanced level
• ^235UF6 and ^238UF6 (molar masses 349 and 352) are separated by effusion. The separation factor per stage is sqrt352/349. The minimum number of stages needed to... JEE Advanced level
• A bulb filled with He (molar mass 4) at 1.00 atm leaks through a pinhole into vacuum and its pressure falls to 0.80 atm in 100 s. If the same bulb at the same t... JEE Advanced level
• A mixture of N2 (28) and SO2 (64) in mole ratio 1 : 2 effuses through a pinhole. The mole percent of N2 in the gas that first effuses (two decimals; take sqrt64... JEE Advanced level
• A porous partition separates two compartments. Compartment 1 contains H2 at 1 atm and compartment 2 contains O2 at 1 atm, both at the same temperature. Which st... JEE Advanced level
• The ratio of the rates of diffusion of SO2 (64) and O2 (32) under identical conditions is NEET level
• Gas A (molar mass M_A) at 2 atm and gas B (molar mass M_B) at 1 atm effuse through identical pinholes at the same temperature at equal rates. Then M_A/M_B is JEE Main level
• The ratio of the rate of effusion of He (4) to that of CO2 (44) under identical conditions, to two decimals, is JEE Main level
• Under identical conditions of temperature and pressure, which pairs of gases diffuse at the same rate? JEE Main level
• A mixture of H2 (2) and He (4) in the mole ratio 2 : 1 effuses through a pinhole. The mole fraction of H2 in the gas that effuses out initially is JEE Advanced level
• H2 (2) and O2 (32) are released simultaneously at the two ends of a 100 cm tube. Assuming the gases travel at rates given by Graham's law, the distance in cm (n... JEE Advanced level
• A sample of pure O2 takes t_1 seconds to effuse a certain volume. A mixture of O2 and H2 with average molar mass 8 g mol^-1 takes t_2 seconds for the same volum... JEE Advanced level