The heterolytic decomposition of the carbon-chlorine bond forms:

Fill in the blanks:
$(1)$ ......... is the name of $C_6H_5Br_2$.
$(2)$ .......... and ......... are the suffixes for aldehyde and hydroxyl functional groups,respectively.
$(3)$ $A$ is formed by homolytic fission,while $B$ is formed by heterolytic fission of the $C-Cl$ bond in $CH_3-Cl$.
$(4)$ The fission of a covalent bond is of ......... and ......... type.

Which of the following statements is not characteristic of free radical chain reaction?

The most likely protonation site in the following molecule is:

What type of fission is possible by sunlight?

Which statement is correct for the given reactions?