The azeotropic mixture of $HCl$ and water contains ...... $\%$ $HCl$.

When rectified spirit and benzene are distilled together,the first fraction obtained is

The boiling point of an azeotropic mixture of water and ethanol is less than that of both pure water and pure ethanol. The mixture shows:

The vapour of which liquid is present at the upper and lower side of the distillation column?

$A$ liquid mixture that boils without changing its composition is called:

Dilute hydrochloric acid cannot be concentrated beyond which of the following concentrations by boiling (in $\%$)?