First slide

Amino acids

Question

Consider the following compounds.
(I) Glycine (II) Sulphanilic acid (III) Anthranilic acid
Which can form dipolar (Zwitter) ion?

Moderate

A

I and II
B

I, II and III
C

II and III
D

I and III

Solution

Because of the presence of acidic $(- COOH or - {SO}_{3} H)$ group and basic $(- {NH}_{2})$ group all the given compounds can exist in Zwitter ionic form.

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