Total number of stereoisomers of the compound $1$ -bromo- $3$ -chlorocyclobutane is
$0$
$1$
$2$
$3$
The configurations of the reactant and the product in the following reaction, respectively, are:
A solution of optically active $1$ -phenylethanol racemizes in acidified aqueous medium. It is due to
Total number of possible stereoisomers of dimethyl cyclopentane is ....
$CH_3 - CHCl - CH_2 - CH_3$ has a chiral centre. Which one of the following represents its $R-$configuration ?
The $S$ - enantiomer of ibuprofen is responsible for its pain-relieving properties.Which one of the following structures shown below is $(S)$ -ibuprofen ?