The V.P. in mm Hg of an aqueous solution obtained by adding 18 g of glucose to 180 g of water at `100^(@)C` is

Options

A. `7.60`
B. `76.0`
C. 759
D. 752.4

Answer

D

Explanation

`(p_(1)^(o)-p)/p_(1)^(o)=1 - p/p_(1)^(o) = (W_(2) xx M_(1))/(M_(2) xx W_(1))= (180 xx 18)/(180 xx 180)=1/100` `:. p/760 = 1 - 0.01 = 9.99`
`p=9.99 xx 760 = 752.4 mm`
`(p_(1)^(o) = V.P. "of water at " 100^(@)C = 760 mm)`