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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.
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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.
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संबंधित प्रश्न
What is the action of the following reagents on aniline?
Bromine water
Give reasons for the following:
Aniline does not undergo Friedel- Crafts reaction.
What is the action of acetic anhydride on diethylamine?
What is the action of the following reagents on aniline?
Acetic anhydride
How will you convert the following?
Aniline into N−phenylethanamide
In the nitration of benzene using a mixture of conc. \[\ce{H2SO4}\] and conc. \[\ce{HNO3}\], the species which initiates the reaction is ______.
What is the role of \[\ce{HNO3}\] in the nitrating mixture used for nitration of benzene?
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
How can the activating effect of the −NH2 group in aniline be controlled?
Aniline does not give Friedel-Crafts reaction. Give a reason.
