Class 12 Chemistry Haloarenes Notes and Important Questions
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Notes for Class 12 Haloarenes (Chemistry) are shown above.
Practice
Important Questions
Write an example of each of the following chemical reactions.
a) Gattermann reaction
b) Reimer–Tiemann reaction
c) Cannizzaro’s reaction
d) Esterification reaction
e) Rosenmund reduction reaction
The organic compound (X) boiled with water gives phenol. What is the compound (X)?
Chlorobenzene
Benzenediazonium chloride
Benzenesulphonic acid
Aniline
An aromatic compound (A) in which one chlorine atom is substituted at benzene ring. When the compound (A) is heated with 2,2,2-trichloroethanal in presence of conc. H₂SO₄ gives an insecticide (B). The compound (A) when treated with an acid chloride containing two carbon atoms in the presence of anhydrous AlCl₃ gives (C).
How would you obtain compound A from benzene diazonium chloride?
Identify B and C.
Reaction of aq. NaOH on the compound (A) is more difficult than with chloroethane, justify with a suitable explanation.
What happens when chlorobenzene is heated with:
What does the conc. HNO₃ act during the nitration of benzene?
acid
base
electrophile
nucleophile
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Exam
Past Question Analysis
Historical exam-pattern data from past NEB question papers — not a prediction of future questions.
2
Question Items
3
Total Marks
1
Papers Appeared In
| Year | Question Items | Marks |
|---|---|---|
| 2082 | 2 | 3 |
Also appears in 3 model questions (not counted above — model sets aren't actual NEB exam history).
Haloarenes focuses on halogen-containing aromatic compounds such as chlorobenzene. The chapter covers their nomenclature, preparation, properties and chemical reactions, including nucleophilic and electrophilic substitution, reduction and reactions such as Fittig and Wurtz-Fittig reactions.
This page covers Haloarenes, chapter 10 of 22 in the Class 12 Chemistry syllabus set by the National Examination Board (NEB). 5 important questions for this chapter are available, each with a full solution.
For numerical and derivation-based chapters like this one, working through past NEB questions is usually more useful than re-reading notes alone — try solving each important question above before checking the solution, then compare your working step by step.