Question

Which of the following staements is incorrect about amino acids?

• A. Amino acids are colorless, crystalline solid.
• B. They are soluble in water and solubility varies with $R$-group of amino acid.
• C. They have sharp and low melting points.
• D. All amino acids (except glycine) are optically active

Answer 1

The correct option is C They have sharp and low melting points.

Amino acids are colorless, crystalline solids. All amino acids have a high melting point greater than ${200}^{\circ }C$
Solubility: They are soluble in water. Solubility depends on R-group of amino acids and $pH$ of the solvent.
All amino acids (except glycine) are optically active.
Hence, (c) is correct option.