question_answer

In a flask of volume \['V'\]litres, 0.2 mol of oxygen, 0.4 mol of nitrogen, 0.1 mol of ammonia and 0.3 mol of helium are enclosed at\[27{}^\circ C\]. If the total pressure exerted by these non-reacting gases is 1 atmosphere, the partial pressure exerted by nitrogen is

A)  \[1\text{ }atm\]            

B)  \[0.1\text{ }atm\]

C)  \[0.2\text{ }atm\]        

D)  \[0.4\text{ }atm\]