Advertisements
Advertisements
प्रश्न
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
विकल्प
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.
उत्तर
Assertion (A) is true, but Reason (R) is false.
Explanation:
m-bromobenzoic acid is produced by brominating benzoic acid. As an electron-withdrawing group, −COOH reduces electron density in a π system, making it more electrophilic and directing the incoming group to the meta position. The −COOH group decreases electron density in the ortho and para positions while increasing electron density in the meta position.
APPEARS IN
संबंधित प्रश्न
What is the action of acetic anhydride on ethylamine?
Give reasons for the following:
Aniline does not undergo Friedel- Crafts reaction.
Write the structures of main products when aniline reacts with the following reagents :
Br2 water
Write short notes on acetylation.
What is the action of acetic anhydride on diethylamine?
When bromination of aniline is carried out by protecting – NH2. The major product is
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
In the following reaction, the reason for why meta-nitro product also formed is:
How can the activating effect of the −NH2 group in aniline be controlled?
Aniline does not give Friedel-Crafts reaction. Give a reason.