A) It has no optical rotation.
B) It cannot be superimposed on its mirror image.
C) It has a linear structure.
D) It has no stereocenters.

A) An atom that is bonded to four identical groups.
B) An atom that is bonded to three different groups.
C) An atom that is bonded to two groups.
D) An atom that is bonded to four different groups.

A) 1
B) 2
C) 4
D) 3

A) Plane-polarized light.
B) Visible light.
C) Ultraviolet light.
D) Infrared light.

A) By checking the molecular weight of a compound.
B) By measuring optical activity with a polarimeter.
C) By analyzing the color of the substance.
D) By counting the number of carbons in a molecule.

A) A mixture of diastereomers.
B) A 50:50 mixture of two enantiomers.
C) A mixture of structurally different molecules.
D) A mixture of meso compounds.

A) They have no medicinal value.
B) They are easier to synthesize.
C) They have the same properties in the body.
D) They can have different biological effects.

A) A compound that rotates the plane of polarized light.
B) A compound that absorbs light.
C) A compound with no stereocenters.
D) A compound with high molecular weight.

A) Enantiomers have identical physical properties except for optical activity.
B) Diastereomers have identical boiling points.
C) Racemic mixtures have higher melting points than pure enantiomers.
D) Chiral molecules are always more soluble than achiral molecules.