Meso-tartaric acid is optically inactive due to the presence of

What is the number of optical isomers for $2, 3-$dibromobutanoic acid?

Which of the following properties is $NOT$ identical for enantiomers?

The number of stereoisomers of the compound $CH_3CHBrCHBrCOOH$ is

The concentration of an organic compound in chloroform is $6.15 \ g$ per $100 \ mL$ of solution. $A$ portion of this solution in a $5 \ cm$ polarimeter tube causes an observed rotation of $-1.2^{\circ}$. What is the specific rotation of the compound?

How many chiral carbon atoms are present in $2,3,4$-trichloropentane?