20 g of non-electrolyte, non-volatile solute `(C_(x)H_(2x)O_(6))` when dissolved in 100 gm water at `100^(@)C`, lowers the vapour pressure of solution by `(1)/(100)`th of the vapour pressure of pure water at this temperature. What is formula of the compound ?

Answer

4

Explanation

`CH_(3)-underset(O)underset(||)(C )-CH_(2)-CH_(2)-CH_(2)-CH_(3)` " " `CH_(3)-underset(O)underset(||)(C )-underset(CH_(3))underset(|)(CH)-CH_(2)-CH_(3)`
`CH_(3)-underset(O)underset(||)(C )-CH_(2)-underset(CH_(2))underset(|)(CH)-CH_(3)` " " `CH_(3)-underset(O)underset(||)(C )-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C )-CH_(3)`