Exercise-4

Which one of the following compounds can be deprotonated by $\mathrm{OH}$ fastest?

An organic compound, ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$ does not give a precipitate with $2, 4$-dinitrophenylhydrazine reagent and does not react with metallic sodium. It could be:

An organic compound $\mathrm{X}$ on treatment with acidified ${\mathrm{K}}_{\mathrm{2}}{\mathrm{Cr}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{7}}$ gives a compound $\mathrm{Y}$, which reacts with ${\mathrm{I}}_2$ and sodium carbonate to form tri-iodomethane. The compound $\mathrm{X}$ is

Which of the following gives haloform reaction?

m-Chlorobenzaldehyde on reaction with conc. $\mathrm{KOH}$ at room temperature gives 

An organic compound $\left(\mathrm{A}\right), {\mathrm{C}}_8{\mathrm{H}}_4{\mathrm{O}}_3$, in dry benzene in the presence of anhydrous ${\mathrm{AlCl}}_3$ gives compound $\left(\mathrm{B}\right)$. The compound $\left(\mathrm{B}\right)$ on treatment with ${\mathrm{PCl}}_5$, followed by reaction with ${\mathrm{H}}_2/\mathrm{Pd}\left({\mathrm{BaSO}}_4\right)$ gives compound $\left(\mathrm{C}\right)$, which on reaction with hydrazine gives a cyclised compound $\left(\mathrm{D}\right)\left({\mathrm{C}}_{14}{\mathrm{H}}_{10} {\mathrm{N}}_2\right)$ Identify $\left(\mathrm{A}\right), \left(\mathrm{B}\right), \left(\mathrm{C}\right)$ and $\left(\mathrm{D}\right)$. Explain the formation of $\left(\mathrm{D}\right)$ from $\left(\mathrm{C}\right)$.

The product of the following reactions is optically inactive and exists in $\mathrm{Y}$ diastereomeric forms, report your answer as $10\times \mathrm{Y}$.

In which of the following reactions correct major product is mentioned?