Which one of the following is the correct statement?

Options

A. Achiral molecules are superimposable
B. Alanine is optically inactive amino acid
C. Glycine is optically active amino acid
D. There is inversion when (-)-2-methylbutan-1-ol is heated with conc. HCl to form (+)-1-chloro-2-methylbutane

Answer

D

Explanation

(a) Achiral molecules may be superimposable or not.
(b) Alanine contains chiral carbon atom, so it is optically active.
(`C^(**)` = chiral carbon atom)
(c ) Because of the absence of chiral centre, glycine `(H_(2)NCH_(2)COOH)` is optically inactive.
(d) Racemic mixtures are optically inactive. (e)