In aqueous solution an amino acid exists as a dipolar ion known as a:
AZenith ion
BZephyr ion
CZodiac ion
DZwitter ion
Answer & Solution
Correct answer: D. Zwitter ion
1. The carboxyl group can lose a proton.
2. The amino group on the same molecule can accept one.
3. That gives rise to a dipolar ion known as the zwitter ion.
4. So the answer is a zwitter ion.
_Source: NCERT Class XII Chemistry Part II, Ch 10 'Biomolecules'_
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