Optical isomerism arises due to the presence of

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?

The number of optically active products obtained from the complete ozonolysis of the given compound is $:$

Which of the following forms of tartaric acid is optically active?

$A$ compound has $3$ chiral carbon atoms. The number of possible optical isomers it can have is:

$CH_3 - CHCl - CH_2 - CH_3$ has a chiral center. Which one of the following represents its $R$-configuration?