Advertisements
Advertisements
Question
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
Options
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.
Advertisements
Solution
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
RELATED QUESTIONS
How is chlorobenzene prepared from aniline?
What is the action of acetic anhydride on ethylamine?
Write the structures of main products when aniline reacts with the following reagents :
Br2 water
Write the structures of main products when aniline reacts with the following reagents :
(CH3CO)2O/pyridine
What is the action of the following reagents on aniline?
Hot and conc. sulphuric acid
How will you convert the following?
Aniline into N−phenylethanamide
What is the role of \[\ce{HNO3}\] in the nitrating mixture used for nitration of benzene?
A solution contains 1 g mol. each of p-toluene diazonium chloride and p-nitrophenyl diazonium chloride. To this 1 g mol. of alkaline solution of phenol is added. Predict the major product. Explain your answer.
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
Identify the major product C formed in the following reaction sequence:
\[\ce{CH3 - CH2 - CH2 - I ->[NaCN] A ->[OH-][Partial hydrolysis] B ->[NaOH][Br2] \underset{(major)}{C}}\]
