Question

X – Amino acid behave as crystalline ionic solid and have high melting-point due to the present of:-

Options

• NH₂ group

• COOH group

• Both –NH₂ and COOH group

• None of these

Answer 1

None of these

Explanation:

Because of the presence of zwitterions, alpha-amino acid behaves as a crystalline ionic solid with a high melting point. As a result, amino acids exist as a dipolar ion (or zwitterion). As a result, zwitterions have strong electrostatic forces.