If pressure is in atmosphere and volume in dm3 , then the unit of 'a' is-
1.
2.
3.
4.
If 1 g of each of the following gases are taken at STP, then the gas that will have the highest volume is -
1. CH4
2. H2O
3. NO
4. CO
The pressure of 1 gm of an ideal gas A at 27 °C is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at the same temperature, the pressure becomes 3 bar.
The correct relationship between their molecular masses is -
1. MA=MB
2. 4MA=MB
3. MA= 2MB
4. 2MA=MB
At 0°C, the density of a certain oxide of a gas at 2 bar is the same as that of dinitrogen at 5 bar.
The molecular mass of the oxide would be -
1. 35 g/mol
2. 45 g/mol
3. 70 g/mol
4. 60 g/mol
The volume of H2 that would be released when 0.15 g of aluminium reacts at 20 °C and 1 bar pressure with caustic soda is-
1. 225 L
2. 301 mL
3. 156 L
4. 203 mL
The pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27 °C would be -
A 200 mL flask having oxygen at 220 mm and a 300 mL flask having nitrogen at 100 mm are connected in such a way that may combine in their volumes if temperature is kept constant. The total pressure of the gaseous mixture is-
1. 158 mm
2. 138 mm
3. 148 mm
4. 168 mm
The partial pressure of oxygen in a flask containing 16 g and 32 g is-
1. 1/16 of total pressure
2. 1/2 of total pressure
3. 2/3 of total pressure
4. None of the above
Equal weights of ethane and hydrogen gas are mixed in an empty container at . The fraction of total pressure exerted by hydrogen is-
1. 1: 2
2. 1: 1
3. 1: 16
4. 15: 16
The compressibility factor of a gas is less than unity at STP. The correct statement among the following is -
1. > 22.4 L
2. < 22.4 L
3. = 22.4 L
4. = 44.8 L