$\alpha$-hydroxy propanoic acid has $..........$ asymmetric carbon atoms.

Pure $(S)-2-$butanol has a specific rotation of $+13.52^{\circ}$. $A$ sample of $2-$butanol prepared in the lab and purified by distillation has a calculated specific rotation of $+6.76^{\circ}$. What can you conclude about the composition?

An enantiomerically pure acid is treated with a racemic mixture of an alcohol having one chiral carbon. The ester formed will be

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?

Which one of the following acids does not exhibit optical isomerism?

Statement-$1$: Molecules that are not superimposable on their mirror images are chiral.
Statement-$2$: All chiral molecules have chiral centers.