Question

Statement-1 : Azeotropic mixtures are formed only by
non-ideal solutions and they may have boiling points either
greater than both the components or less than both the
components.
Statement-2 : The composition of the vapour phase is same
as that of the liquid phase of an azeotropic mixture.

Answer 1

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

Explanation:

• Azeotropic mixtures are formed only by  non-ideal solutions and they may have boiling points either greater than both the components or lesser than both the components.
• The composition of the vapour phase is same as that of the liquid phase of an azeotropic mixture.
• Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
• Non-ideal solutions with positive deviation i.e having more vapour pressure than expected, boil at lower temperature while those with negative deviation boil at higher temperature than those of the components.