The absolute configurations of the two centers in the following molecule are
$2(R), 3(S)$
$2(R), 3(R)$
$2(S), 3(S)$
$2(S), 3 (R)$
Which of the following are meso compound?
It is possible to distinguish between optical isomers by
Total number of stereoisomers of the compound $1$ -bromo- $3$ -chlorocyclobutane is
Rotation of plane polarised light is measured by
$(X)$ $\&$ $(Y)$ are