Average molar mass of mixtures, vapour density

38 questions on Average molar mass of mixtures, vapour density from the Mole Concept chapter: 6 NEET level, 15 JEE Main, 17 JEE Advanced. Each one opens with its answer and solution.

• The vapour density of carbon dioxide (C=12, O=16) is NEET level
• A gas mixture contains 0.5 mol of O2 (32 g/mol) and 1.5 mol of N2 (28 g/mol). Its average molar mass is NEET level
• A gas has vapour density 8.5. Which of the following could it be? NEET level
• A mixture contains 3.2 g of O2 (32 g/mol) and 5.6 g of N2 (28 g/mol). The average molar mass is JEE Main level
• Dry air is taken as 80% N2 and 20% O2 by volume (N2=28, O2=32 g/mol). The vapour density of air (relative to hydrogen) is JEE Main level
• A gas mixture contains H2 (2 g/mol) and He (4 g/mol) in equal masses. The mole fraction of H2 is JEE Main level
• N2O4 (92 g/mol) partly dissociates as N2O4 <=> 2NO2 at a certain temperature, and the equilibrium mixture has vapour density 34.5. The degree of dissociation of... JEE Main level
• A mixture of CO (28 g/mol) and CO2 (44 g/mol) has vapour density 17.2. Find the mass percent of CO2 in the mixture, to the nearest integer. JEE Main level
• A mixture of CH4 (16 g/mol) and O2 (32 g/mol) has a density of 1.340 g/L at STP (molar volume 22.4 L/mol). Find the volume percent of CH4 in the mixture, to one... JEE Main level
• PCl5 dissociates as PCl5 <=> PCl3 + Cl2 and is 40% dissociated at equilibrium. Taking P=31, Cl=35.5, find the vapour density of the equilibrium mixture, to two ... JEE Main level
• Which of the following gas mixtures has an average molar mass of 30 g/mol? (Molar masses in g/mol: CH4 16, CO2 44, O2 32, N2 28, NO 30, C2H6 30.) JEE Main level
• A mixture of 1 mol N2 and 3 mol H2 (N=14, H=1) reacts by N2 + 3H2 -> 2NH3 until 25% of the N2 has reacted. The average molar mass of the resulting gas mixture i... JEE Advanced level
• A mixture of H2 and N2 has a density 6.0 times that of hydrogen gas under the same conditions (H2=2, N2=28 g/mol). The mass percent of H2 in the mixture is JEE Advanced level
• SO3 (80 g/mol) dissociates as 2SO3 <=> 2SO2 + O2. The equilibrium mixture has a density 34.0 times that of hydrogen under the same conditions (H2=2 g/mol). Find... JEE Advanced level
• A mixture of O2 and O3 has vapour density 18.4 (O=16). The mixture is heated until all O3 decomposes by 2O3 -> 3O2. Find the percent increase in volume at const... JEE Advanced level
• One mole of PCl5 (208.5 g/mol) is 25% dissociated into PCl3 and Cl2. Choose the correct statement(s). JEE Advanced level
• A mixture of CO and CO2 (28 and 44 g/mol) contains 30% carbon by mass (C=12). Choose the correct statement(s). JEE Advanced level
• A mixture of CH4 (16 g/mol) and C3H8 (44 g/mol) has vapour density 15. Choose the correct statement(s). (Molar volume at STP 22.4 L/mol.) JEE Advanced level
• One mole of NH3 (17 g/mol) is 60% dissociated by 2NH3 <=> N2 + 3H2. Choose the correct statement(s). JEE Advanced level
• The vapour density of a gas is 16. Its molar mass in g mol^-1 is NEET level
• A gas mixture contains 3 mol of N2 and 1 mol of O2. Its average molar mass is (N = 14, O = 16) NEET level
• The ratio of the vapour density of SO2 to that of CH4 is (S = 32, O = 16, C = 12, H = 1) NEET level
• Equal masses of CH4 and O2 are mixed. The average molar mass of the mixture is (C = 12, H = 1, O = 16) JEE Main level
• A mixture of N2 and CO2 has vapour density 17. The mole fraction of CO2 is (N = 14, C = 12, O = 16) JEE Main level
• A mixture of O2 and O3 has an average molar mass of 38.4 g mol^-1 (O = 16). The mass percentage of O3 in the mixture is JEE Main level
• A mixture of CH4 and C3H8 has a density of 1.50 g L^-1 at STP (molar volume 22.4 L mol^-1). The mole percentage of CH4 is (C = 12, H = 1) JEE Main level
• A gas sample contains 11 g of CO2, 28 g of N2 and 8 g of O2. Find its average molar mass in g mol^-1, to two decimals (C = 12, N = 14, O = 16). JEE Main level
• A gas mixture contains 0.20 mol H2, 0.30 mol CH4 and 0.50 mol CO. Find the vapour density of the mixture (H = 1, C = 12, O = 16), to one decimal. JEE Main level
• A mixture contains He (M = 4) and CH4 (M = 16). Select the correct statement(s). JEE Main level
• PCl5 dissociates as PCl5 <=> PCl3 + Cl2. The equilibrium mixture has a vapour density of 83.4 (P = 31, Cl = 35.5). The mole fraction of Cl2 in the equilibrium m... JEE Advanced level
• 10.0 L of a mixture of CO and CO2 at STP has a vapour density of 17. It is passed through excess KOH solution, which absorbs only CO2. The volume of gas that re... JEE Advanced level
• A mixture of 1.0 mol H2 and 1.0 mol O2 is sparked so that 2H2 + O2 -> 2H2O goes to completion. Water remains as vapour at the final temperature. The average mol... JEE Advanced level
• 9.2 g of N2O4 (N = 14, O = 16) is vaporised and partly dissociates, N2O4 <=> 2NO2. The mean molar mass of the resulting gas mixture is 69.0 g mol^-1. Find the m... JEE Advanced level
• 100 L (STP) of an O2-O3 mixture contains 20% O3 by volume. The mixture is passed through turpentine oil, which absorbs only O3 completely. Find the decrease in ... JEE Advanced level
• One mole of N2O4 (M = 92) dissociates to the extent alpha = 0.20 in N2O4 <=> 2NO2 (N = 14, O = 16). Select the correct statement(s) for the equilibrium mixture. JEE Advanced level
• A mixture contains 8 g CH4, 32 g SO2 and 14 g N2 (C = 12, H = 1, S = 32, O = 16, N = 14; 22.4 L/mol at STP). Select the correct statement(s). JEE Advanced level
• An equimolar mixture of gases X (M = 44) and Y has a vapour density of 18. Select the correct statement(s). JEE Advanced level
• A hydrocarbon has a vapour density of 53 and contains 90.57% carbon by mass (C = 12, H = 1). Select the correct statement(s). JEE Advanced level