The product of the rearrangement of the given oxyallyl cation is:

Which of the following carbocations is the most stable?

Arrange the following carbanions in the order of their stability:
$i$. $RC \equiv C^{\ominus}$
$ii$. $C_6H_5^{\ominus}$
$iii$. $R_2C = CH^{\ominus}$
$iv$. $R_3C - CH_2^{\ominus}$

Due to the presence of an unpaired electron,free radicals are .........

Explain the heterolytic cleavage of organic compounds to form $(a)$ Carbocations and $(b)$ Carbanions with examples.

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