Give the mathematical expression of dipole moment.

Explanation

(a)Cationic polymerisation is favoured by the peresence of`EDG(e.g.,Megroup`.The more the`EDG`,the more stable is the intermediate carbocation,and as a result more favoured is the cationic polymerisation.
stability ofis
(II)
(I)
The decreasing reactivity order towards cation polymerisation is(II)gt(I)gt(IV)gt(III).
(b) Anion polymetic is favouable by the presence of `EWG(e.g.,rarr-X,-COOR,-CN,etc)`The more the`EWG,the more stable is the intermediate carbonion and consequently more favoured is the anionic polymersation.
Stability of
The decreasing reactivity order towards anion polymersation is(VI)gt(III)gt(V)gt(IV)gt(II)gt(I).