In the reaction
`CH_(3)CHO+HCNrarrCH_(3)CH(OH)CNoverset(H_(2)O)rarrCH_(3)CH(OH)COOH`
an asymmertic cabron is generated. The acid obtained would be

Options

A. `D-`isomer
B. `L-`isomer
C. `50%D` and `50%L` isomer
D. `20%D` and `80%L` isomer

Answer

C

Explanation

Synthesis fo a chiral compound, `CH_(3)CH(OH)CN`, from achiral reactants, `CH_(3)CHO` and `CN^(-)`, always yields the racemic modification.

The flat aldehyde is said to have enatiopic faces because attachement of a fiurth ligands to one or the other face gives one or the other enantiomer. These attacks occur with equal probability, resulting in equal amounts of `D` and `L` (a racemic mixture).