Question 108 of 133

The volume of 0.0168 mol of O2 obtained by decomposition of KClO3 and collected by displacement of water is 428 ml at a pressure of 754 mm Hg at 25°C. The pressure of water vapour at 25°C is [UPSEAT 1996]

(1) 18 mm Hg

(2) 20 mm Hg

(3) 22 mm Hg

(4) 24 mm Hg