Question

Why is benzene reluctant to undergo addition reactions?

Answer 1

because of having weak electron cloud.

Explanation:

actually, `pi`-electrons of benzene are not concentrated at a place, they are highly delocalized, thus unable to effectively attract electrophile. however electrophilic substitution reactions can be done with benzene in presence of a strong acids( to polarize the reagent so can be easily attracted by benzene).