The optically inactive compound from the following is
$2 -$ chloropropanal
$2 -$ chlorobutane
$2 -$ chloropentane
$2 -$ chloro $- 2-$ methylbutane
Which of the following molecule contains asymmetric carbon atom
If a carbon atom is attached to $ - H, - OH, - COOH$ and $ - OCO{C_2}{H_5}$ number of chiral $C -$ atoms in compound is
Total number of substituent present in the above compound
Which one of the following shows optical activity
Among the following, the Newmann projections of meso- $2, 3$ -butanediol are