(A) P,S
(B) Q,S
(C) P,R
(D) Q,R
(A) Dextro
(B) Levo
(C) Meso
(D) Racemic
(B) 2
(B) 4
(C) 3
(D) 8
(A) Dextro
(B) Levo
(C) Meso
(D) Racemic
(A) Two hydrogens attached to a chiral carbon
(B) Two hydrogens on same side of double bond
(B) Two hydrogens on same side of cycloalkane
(D) Two hydrogens attached to a carbon with two different groups
If a carbon is bonded to two hydrogens and to two different groups, the two hydrogens are called enantiotopic hydrogens