Answer:
(i) 
bond acquires some double bond
character. So, it is difficult to cleave it.
(ii) In halogen
C atom is sp2 hybridised and hence is more electronegative
and can hold electron pair more tightly.
(iii)
Instability of phenyl cation.
(iv) Carbon
layer is flanked by delocalised electron layer.
You need to login to perform this action.
You will be redirected in
3 sec
