The vapour pressure of pure water at 20°C is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is added to 178.2 g of water at 20°C,the vapour pressure of resulting solution will be
17.325 m Hg
17.675 mm Hg
15.750 mm Hg
16.500 mm Hg
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