The most stable carbocation among the following is:

In which of the following compounds,the $C-Cl$ bond ionisation shall give the most stable carbonium ion?

The correct order of relative stability for the given free radicals is:

Among the following carbocations:
$(I)$ $Ph_{2}\stackrel{+}{C} CH_{2} Me$
$(II)$ $Ph CH_{2} CH_{2} \stackrel{+}{C} HPh$
$(III)$ $Ph_{2} CH \stackrel{+}{C} HMe$
$(IV)$ $Ph_{2} C(Me) \stackrel{+}{C} H_{2}$
The order of stability is:

The incorrect statement about carbene $(CH_2)$ is:

List the reactive intermediates produced by the fission of a covalent bond and describe their main characteristics.