The boiling point of an azeotropic mixture of water and ethyl alcohol is less than that of the theoretical value of water and alcohol mixture. Hence the mixture shows

Options

A. (a) That solution is highly saturated
B. (b) Positive deviation from Raoult's law
C. ( c) Negative deviation from Raoult's law
D. (d) Nothing can be said

Answer

B

Explanation

Positive deviations from Raoult's law are noticed when:
(i) Exp. Value of vapour pressure of mixture is more than calculated value.
(ii) Exp. Value of b.pt. of mixture is less tha calculated value.
(iii) `Delta H_("mixing") = +ve`
(iv) `Delta V_("mixing") = +ve`.