A mixture of all stereoisomers possible from the structure is subjected to fractional distillation. How many fractions will be obtained from the following?

 

 

How many chiral centres does the following compound contain?

Observed rotation of $2 \mathrm{g}$ of a compound in $10 \mathrm{mL}$ solution in a $25 \mathrm{cm}$ long polarimeter tube is $+13.4°$. The specific rotation of the compound is

Find out the concentration of the solution of a compound with an observed rotation of $+2.0°$ and a specific rotation $(16°)$ in a $1.0 \mathrm{dm}$ tube?

Identify the correct statements about the compound: 

  $$\begin{gathered} {\mathrm{CH}}_3\left(\mathrm{OH}\right)\mathrm{HC}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}\left(\mathrm{OH}\right){\mathrm{CH}}_3 \\ \left(\mathrm{Y}\right) \end{gathered}$$

(a) If stereochemistry around the double bond in $\mathrm{Y}$ is cis, the number of enantiomers possible for $\mathrm{Y}$ is $2$.

(b) There are $4$ meso stereoisomers possible for $\mathrm{Y}$.

(c) Total number of stereoisomers possible for $\mathrm{Y}$ is $4$.

(d) All stereoisomers of $\mathrm{Y}$ are optically active.

Identify the correct statements about the following:

w            

x 

y          

z