In $TLC$ for compound $X$,$R_f = 0.7$ and for $B$,$R_f = 0.4$. Which substance migrates more?

Using the provided information in the following paper chromatogram,calculate the $R_{f}$ value of $A$ .......... $\times 10^{-1}$.

$A$ liquid compound $(x)$ can be purified by steam distillation only if it is

The most suitable method of separation of a $1:1$ mixture of $ortho$- and $para$-nitrophenols is:

Match Column-$I$ and Column-$II$ with the correct relation:

Column-$I$	Column-$II$
$(i)$ Aniline + chloroform	$(p)$ Steam distillation
$(ii)$ Aqueous solution of compound	$(q)$ Fractional distillation
$(iii)$ Mixture of liquids with small difference in boiling point	$(r)$ Differential extraction
$(iv)$ Purification of aniline	$(s)$ Simple distillation

State whether the following statements are True or False:
$(i)$ The purification of a solid is done by crystallisation.
$(ii)$ Crystallisation purifies the solid and distillation purifies the liquid.
$(iii)$ $A$ liquid is purified by sublimation.
$(iv)$ To separate a mixture of ammonium chloride and sodium chloride,the distillation method is applied.