$A$ dilute solution of $HCl$ cannot be concentrated beyond ...... $\%$ by boiling.

Which one of the following mixtures can be separated into pure components by fractional distillation?

Water (boiling point $100^\circ C$) and $HCl$ (boiling point $85^\circ C$) form an azeotropic mixture at $108.5^\circ C$. What is obtained when this mixture is distilled?

If two liquids $A$ and $B$ form a minimum boiling azeotrope at some specific composition,then which statement among the following is correct?

Rectified spirit obtained by fermentation contains $4.5 \%$ of water. To remove this water,rectified spirit is mixed with a suitable quantity of benzene and heated. Benzene helps because:

Given below are two statements:
Statement $(I)$: $1,2,3$-Trihydroxypropane can be separated from water by simple distillation.
Statement $(II)$: An azeotropic mixture cannot be separated by fractional distillation.