Which of the following is totally true?

Question

A: Pure enantiomers rotate the plane of plane polarized light.

B: All chiral compounds rotate the plane of plane polarized light.

C: By using the density of a compound, and it's configuration, we can always calculate the observed rotation of plane polarized light.

Answer 1

A

Answer 2

A and B. Provided that you say that meso compounds like meso-tartaric acid are not chiral. They have asymmetric atoms, but they have planes of symmetry than cancel out chirality overall, and they do not rotate.