Cyclohexane and ethanol at a particular temperature have vapour presure of 280 mm and 168 mm respectively. If these two solutions having mole fraction value of cyclohexane equal to `0.32` are mixed and the mixture has a total vapour pressure of 376 mm, will the mixture be an ideal solution ?

Explanation

Mole fraction of cyclohexane `=0.32`
`:.` mole fraction of ethanol `=1-0.32=0.68`
Thus, ,br> `p=280xx0.32+168xx0.68`…………(Eqn.3)
`=203.84mm`
For the solution to be an ideal one, the vapour pressure should be `203.84` but as the given value of vapour pressure is `376mm`, the solution is not ideal