Density and molar mass of gases

32 questions on Density and molar mass of gases from the Gaseous State: Ideal Gases chapter: 6 NEET level, 13 JEE Main, 13 JEE Advanced. Each one opens with its answer and solution.

• The density of an ideal gas at constant temperature is NEET level
• Which of the following gases has the highest density at the same temperature and pressure? NEET level
• The vapour density of a gas is 24. Its molar mass is JEE Main level
• The density of a gas at 0 degC and 1 atm is 1.25 g L^-1. Taking R = 0.0821 L atm K^-1 mol^-1, its molar mass in g mol^-1 (one decimal) is JEE Main level
• The density of a gas A at 300 K and 2 atm is equal to the density of gas B at 600 K and 1 atm. The ratio of molar masses M_A : M_B is JEE Advanced level
• A mixture of N2 (molar mass 28) and CO2 (molar mass 44) has a density of 1.600 g L^-1 at 300 K and 1.00 atm. Taking R = 0.0821 L atm K^-1 mol^-1, the mole perce... JEE Advanced level
• Which of the following statements about the density d of an ideal gas are correct? JEE Advanced level
• The density of CO2 (molar mass 44) at STP, taking the molar volume as 22.4 L, is nearest to NEET level
• At the same temperature and pressure, the ratio of the densities of SO2 (64) and CH4 (16) is JEE Main level
• The density of butane, C4H10 (molar mass 58 g mol^-1), at 350 K and 2.0 atm, taking R = 0.0821 L atm K^-1 mol^-1, in g L^-1 (two decimals) is JEE Main level
• Which of the following statements are correct? JEE Main level
• The density of a gas is d_1 at temperature T and pressure P. If the pressure is doubled and the kelvin temperature is reduced by one third, the new density is JEE Advanced level
• Two gases X and Y have densities in the ratio d_X : d_Y = 1 : 4 at the same temperature and pressure. Which statements are correct? JEE Advanced level
• A gas mixture of He (4) and O2 (32) has an average molar mass of 11 g mol^-1. Which are correct? JEE Advanced level
• The vapour density of a gas is defined as the ratio of its density to the density of NEET level
• Which expression gives the molar mass M of an ideal gas of density d at pressure P and temperature T? NEET level
• A gas has a density of 2.86 g L^-1 at STP (molar volume 22.4 L). The gas is most likely JEE Main level
• At 273 K and 1 atm the density of a gas is d. At 546 K and 4 atm its density is JEE Main level
• The density of ethane, C2H6 (molar mass 30 g mol^-1), at 400 K and 1.5 atm, taking R = 0.0821 L atm K^-1 mol^-1, in g L^-1 (three decimals) is JEE Main level
• A gas has density 0.880 g L^-1 at 350 K and 1.00 atm. Taking R = 0.0821 L atm K^-1 mol^-1, its molar mass in g mol^-1 (one decimal) is JEE Main level
• Which of the following are correct for a gas at STP (molar volume 22.4 L)? JEE Main level
• At 27 degC and 1 atm, N2O4 is 20% dissociated into NO2. The vapour density of the equilibrium mixture is (molar mass of N2O4 = 92) JEE Advanced level
• A mixture of CH4 (16) and C2H6 (30) has a density of 1.050 g L^-1 at 300 K and 1.00 atm. Taking R = 0.0821 L atm K^-1 mol^-1, the mole percent of C2H6 (one deci... JEE Advanced level
• PCl5 (molar mass 208.5) dissociates as PCl5 <=> PCl3 + Cl2. The observed vapour density of the equilibrium mixture at a certain temperature is 80. The degree of... JEE Advanced level
• The density of a gas X is d_X at T and P. Which of the following are correct? JEE Advanced level
• The molar mass of a gas whose vapour density is 32 is NEET level
• Which of the following gases has the lowest density at the same temperature and pressure? JEE Main level
• The density of a gas is 1.78 g L^-1 at STP (molar volume 22.4 L). The gas could be JEE Main level
• The density of H2 (molar mass 2) at 500 K and 0.50 atm, taking R = 0.0821 L atm K^-1 mol^-1, in mg L^-1 (one decimal) is JEE Main level
• A mixture of O2 and O3 has a vapour density of 20. The mole fraction of O3 in the mixture is JEE Advanced level
• At 350 K and 1.0 atm, N2O4 (molar mass 92) is 40% dissociated into NO2. Taking R = 0.0821 L atm K^-1 mol^-1, the density of the equilibrium mixture in g L^-1 (t... JEE Advanced level
• Which of the following statements regarding molar mass determination of gases are correct? JEE Advanced level