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
0.5 L of H2 at 0.8 bar and 2.0 L of dioxygen at 0.7 bar are introduced in a 1L vessel at 27°C.
The pressure inside the vessel would be -
1. 3.6 bar
2. 1.8 bar
3. 4.1 bar
4. 0.7 bar
A student forgot to add the reaction mixture to the round-bottomed flask at 27 °C but instead, he placed the flask on the flame. After a lapse of time, he realized his mistake and using a pyrometer he found the temperature of the flask was 477 °C. The fraction of air that would expel out would be :
1. 1/3
2. 4/5
3. 3/5
4. 2/3
The density of a gas is found to be 5.46 g/dm3 at 27°C at 2 bar pressure. The density of gas at STP would be -
As per Charles's law ,–273° C is the lowest possible temperature because:
1. | All gases get liquefied before reaching a temperature of – 273° C. |
2. | All gases get liquefied after reaching a temperature of – 273° C. |
3. | All gases have a critical temperature of –273° C. |
4. | None of the Above. |
The minimum pressure required to compress 500 dm3 of air at 1 bar to 200 dm3 at 30°C is :
1. 3.6 bar
2. 3.2 kbar
3. 2.5 bar
4. 2.8 kbar