Which one of the following is an electrophilic intermediate in the reaction of benzene with $CH_3Cl$ in the presence of anhydrous $AlCl_3$?

Which of the following has maximum stability?

Which of the following carbocations will not undergo rearrangement?

State whether the following statements are True or False:
$(i)$ $CH_3-CH_2^+$ is more stable than $CH_3^+$
$(ii)$ $CH_3-CH_2^+$ is less stable than $CH_3^+$
$(iii)$ $(CH_3)_3C^+$ is less stable than $CH_3^+$
$(iv)$ $(CH_3)_3C^+$ is more stable than $CH_3^+$

What is homolytic cleavage of a covalent bond? Explain with an example. Or,write about bond cleavage and the intermediate free radical.

Arrange the following free radicals in the correct order of their stability:
$(i)$ $CH_2=\dot{C}H$
$(ii)$ $\dot{C}H_3$
$(iii)$ $CH_3-\dot{C}H-CH_3$
$(iv)$ $(CH_3)_3\dot{C}$