Assertion A: -halo carboxylic acid on reaction with dil. gives good yield of -amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides. Reason R: Amino acids exist in zwitter ion form in aqueous medium. [2023]

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Solution

Q.
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: $α$ -halo carboxylic acid on reaction with dil. ${NH}_{3}$ gives good yield of $α$ -amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides.

Reason R: Amino acids exist in zwitter ion form in aqueous medium.

In the light of the above statements, choose the correct answer from the options given below: [2023]

1 Both (A) and (R) are correct and (R) is the correct explanation of (A)

2 (A) is not correct but (R) is correct

3 Both (A) and (R) are correct but (R) is not the correct explanation of (A)

4 (A) is correct but (R) is not correct

Ans.
(1)

$α$ -halocarboxylic acid react with dil. ${NH}_{3}$ at faster rate than amines and amino acids exist in zwitter ion form in aqueous medium.

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