One litre of oxygen at a pressure of 1 atm and two litres of nitrogen at a pressure of 0.5 atm are introduced into a vessel of volume 1 litre. If there is no change in temperature, the final pressure of the gas in atm is

One litre of oxygen at a pressure of 1 atm and two litres of nitrogen

1.	One litre of oxygen at a pressure of 1 atm and two litres of nitrogen at a pressure of 0.5 atm are introduced into a vessel of volume 1 litre. If there is no change in temperature, the final pressure of the gas in atm is
Answer» `1.5` `2.5` `2` `4` ANSWER :C