Absolute alcohol cannot be prepared by fractional distillation of rectified spirit since:

Azeotropic mixture of $HCl$ and water has .......... $\%$ $HCl$.

What is the approximate percentage by mass of aqueous $HNO_3$ that can be obtained by distillation (in $\%$)?

Absolute ethanol cannot be obtained by simple fractional distillation of a solution of ethanol and water because:

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

The boiling point of an azeotropic mixture of water-ethanol is less than that of both water and ethanol. Then