Question

What will happened in the benzene ring by the presence of nitro group:
A.Activates the ring towards electrophilic substitution
B.Renders the ring basic
C.Deactivates the ring towards nucleophilic substitution
D.Deactivates the ring towards electrophilic substitution

Answer 1

Hint: For solving this question, we should know about benzene rings and about nitro groups. Benzene ring is the simplest aromatic hydrocarbon. It is a colorless and sweat odor liquid having the chemical formula
as ${C_6}{H_6}$. Nitro compounds are the organic compounds which consist of one or more nitro functional groups.

Complete step-by-step answer:Properties of Benzene:-
1.It is a chemical which is a colorless or light yellow liquid at the room temperature.
2.It generally has a sweet odor.
3.It is highly flammable.
4.It evaporates very quickly into the air. Its vapors are generally heavier than air.
About Nitro group:
Nitro group is a functional group which makes a compound more explosive. It is a strong electron withdrawing group. These are also used as solvent and chemical intermediates in various chemical reactions.

Hence, as a nitro group is a strong electron withdrawing group thus, it will withdraw the electron from the benzene ring towards itself. Thus it will deactivate the benzene ring towards electrophilic substitution reaction.

Hence, the option D, is the correct option.

Note:Benzene is generally formed from both the natural and as well as human activities. Natural sources which are the reasons for the formation of benzene include volcanoes and forest fires. The major exposure of benzene is tobacco smoke.