Electrophilic Substitution Reaction

Q.

Dehydrohalogenation of an alkyl halide is a/an?

1. Nucleophilic substitution reaction

2. Elimination reaction

3. Both nucleophilic substitution and elimination reaction

4. Rearrangement

Q. Among the following compounds the one that is most reactive towards electrophilic nitration is :

1. toluene
2. nitrobenzene
3. benzene
4. benzoic Acid

Q. Correct answer is 2. Give reason why
Q.33. Which of the following compounds will not undergo Friedal-Crafts reaction easily?
(1) Xylene
(2) Nitrobenzene
(3) Toluene
(4) Cumene