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• Topic:

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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 ${27}^{o}C$. If the total pressure exerted by these non-reating gases is one atmosphere, the partial pressure exerted by nitrogen is [Kerala MEE 2001]

(1) 1 atm

(2) 0.1 atm

(3) 0.2 atm

(4) 0.4 atm