A mixture of carbon monoxide and carbon dioxide is found to have a density of 1.7 g/L at S.T.P. The mole fraction of carbon monoxide is-
1. 0.37
2. 0.40
3. 0.30
4. 0.50
The volume of a gas is 100 ml at 100°C. If the pressure remains constant then the temperature at which the volume becomes 200 ml is-
1. 200°C
2. 473°C
3. 746°C
4. 50°C
If 300 ml of a gas at 27°C is cooled to 7°C at constant pressure, its final volume will be:
1. | 135 ml | 2. | 540 ml |
3. | 350 ml | 4. | 280 ml |
A flask containing air (open to atmosphere) is heated from 300 K to 500 K. The percentage of air escaped to the atmosphere is nearly-
1. 16.6
2. 40
3. 66
4. 20
A sealed tube which can withstand a pressure of 3 atmosphere is filled with air at and 760 mm pressure. The tube will burst at -
1. 900°C
2. 627°C
3. 726°C
4. 1173°C
The number of moles of H2 in 0.224 litre of hydrogen gas at STP (273 K, 1 atm.) is-
1. 1
2. 0.1
3. 0.01
4. 0.001
120 g of an ideal gas of molecular weight 40 g mole–1 are confined to a volume of 20 L at 400 K. The pressure of the gas is-
( )
1. 3.90 atm
2. 4.92 atm
3. 6.02 atm
4. 2.96 atm
The volume of 2.8 g of carbon monoxide at 27°C and 0.821 atm pressure is-
1. 0.3 litre
2. 1.5 litre
3. 3 litre
4. 30 litre
3.2 g of oxygen and 0.2 g of hydrogen are placed in a 1.12 litre flask at 0°C.
The total pressure of the gas mixture will be-
1. 1 atm
2. 4 atm
3. 3 atm
4. 2 atm
The density of methane at 2.0 atmosphere pressure and 27°C is-
1. 0.13 gL–1
2. 0.26 gL–1
3. 1.30 gL–1
4. 2.60 gL–1