Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :

Choose the correct option for the total pressure (in atm.) in a mixture of 4g O₂ and 2g H₂ confined in a total volume of one litre at 0$$^\circ$$C is :

[Given R = 0.082 L atm mol^$$-$$1K^$$-$$1, T = 273 K]

A mixture of N₂ and Ar gases in a cylinder contains 7g of N₂ and 8g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of N₂ is :
[Use atomic masses (in g mol^{$$ - $$1}) : N = 14, Ar = 40]