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

Components of a binary mixture of two liquids $A$ and $B$ were being separated by distillation. After some time,the separation of components stopped and the composition of the vapour phase became the same as that of the liquid phase. Both the components started coming in the distillate. Explain why this happened.

An azeotropic solution of two liquids is one that:

An azeotropic solution boils at a temperature lower than the boiling point of any of its components. This solution shows:

If the boiling point of an azeotropic mixture of two liquids is lower than that of either of them,then it:

$A$ mixture of two completely miscible non-ideal liquids which distils without change in its composition at a constant temperature as though it were a pure liquid. This mixture is known as: