Assertion: Vinyl halides do not undergo substitution reaction.
Reason: Although the cation is stablished by loosely bound `pi`-electron cloud, it least occurs due to high bond strength.

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease. Reason:The carbon halogen bond in aryl halides has partial double bonds character.

Assertion: Aryl halides undergo nucleophilic substitution reactions with ease. Reason:The carbon halogen bond in aryl halides has partial double bonds character.

Assertion (A) : Unsatured organic com pounds undergo substitution reactions. Reason (R) : Unsaturated organic compounds contain = or-= bonds.

Assertion : Aryl halides undergo nucleophilic substitution with ease Reason : Carbon-halogen bond in aryl halides has partial double bond character.

Assertion: Benzene does not give electrophilic substition reactions. Reason: Benzene ring has extraordinarily stability because of delocalisation of six pi -electrons of three double bonds.

Assertion: The presence of nitro group facilitates nucleophilic substitution reaction in aryl halide. Reason : The intermediate carbanion is stabilised due to the presence of the nitro group.