Question

Is heterolytic cleavage possible in benzene ??

Answer 1

whether homolytic or heterolytic cleavage will happen in a particular chemical reaction depends on the specific chemical situation, and how stable the possible products are relative to each other. Some reactions that break bonds do so homolytically, and others do so heterolytically.

Answer 2

This is often called a "heterolytic" bond cleavage since in the products the electron pair is distributed quite unevenly. ... This is called "homolytic" bond cleavage since in the products the distribution of the electron pair is quite even.