Halorenes

IMPORTANT

Halorenes: Overview

This Topic covers sub-topics such as Haloarenes, Raschig Process, Chemical Reactions of Haloarenes, Sulphonation of Haloarenes, Reduction of Chlorobenzene, Reaction of Haloarenes with Metals and, Preparations of Haloarenes

Important Questions on Halorenes

MEDIUM
IMPORTANT

In which of the following conversions oxidation is taking place

(i) propanone to propene

(ii) benzoic acid to benzaldehyde

(iii) bromobenzene to 1-phenylethanol

MEDIUM
IMPORTANT

Benzyl chloride   ( C 6 H 5 C H 2 Cl ) can be prepared from toluene by chlorination with –

HARD
IMPORTANT

What is meant by rasching process in organic chemistry?

EASY
IMPORTANT

During the conversion of chlorobenzene to benzene, nickel-aluminium alloy is used as the reductant.

EASY
IMPORTANT

The reduction reaction of chlorobenzene produces benzene in presence of nickel-aluminium alloy.

EASY
IMPORTANT

The reduction reaction of chlorobenzene in presence of nickel-aluminium alloy produces _____.

EASY
IMPORTANT

The conversion reaction of chlorobenzene gives benzene by _____.

EASY
IMPORTANT

Write the reduction reaction of chlorobenzene.

MEDIUM
IMPORTANT

Assertion: In mono haloarenes, electrophilic substitution occurs at ortho and para positions.

Reason: Halogen atom is a ring deactivator.
 

HARD
IMPORTANT

Which of the following cannot be prepared by Sandmeyer's reaction?

MEDIUM
IMPORTANT

Write the chemical reaction between potassium iodide and diazonium chloride.

MEDIUM
IMPORTANT

The metal used in the Ullmann reaction is

MEDIUM
IMPORTANT

Explain the Wurtz-Fittig reaction.

MEDIUM
IMPORTANT

Explain Fittig reaction.

MEDIUM
IMPORTANT

Chlorobenzene and sodium react in dry ether medium to yield _____ (organic compound).

MEDIUM
IMPORTANT

 Electrophilic substitution reactions of Haloarenes are

EASY
IMPORTANT

 Electrophilic substitution reactions of Haloarenes are meta directing.

MEDIUM
IMPORTANT

 Electrophilic substitution reactions of Haloarenes are

HARD
IMPORTANT

Write the mechanism of the electrophilic substitution reaction of Haloarenes.

MEDIUM
IMPORTANT

Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards _____  substitution.(nucleophilic/electrophilic)