What is an eluant?

Which are the types of chromatography?

By the crystallisation of an impure compound,if the mother liquor becomes coloured,what shall be done to remove the colour?

Which of the following statements is not true about partition chromatography?

Fill in the blanks:
$1$. In formulas and reactions,the electron pair displacement is indicated by a curved arrow,and the single electron displacement is indicated by a ..........
$2$. There are more than .......... plates in the columns of fractional distillation.
$3$. Fractional distillation is used for the separation of liquids with a .......... difference in boiling points,and simple distillation is used for the separation of liquids with a .......... difference in boiling points.
$4$. The .......... technique is applied to separate different fractions of crude oil in petroleum.

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