Carbonyl compounds can generally be converted to hydrocarbons by

You have two $C_6H_{10}O$ ketones,$I$ and $II$. Both are optically active,but $I$ is racemized by treatment with acid and $II$ is not. Wolff-Kishner reduction of both ketones gives the same achiral hydrocarbon,formula $C_6H_{12}$. What reasonable structures may be assigned to $I$ and $II$ respectively?

In $3-Methyl-2-cyclohexenone$,which hydrogen cannot undergo deuterium exchange when it reacts with $CH_3O^{-} / CH_3OD$?

Which of the following reagents reacts differently with $HCHO$,$CH_3CHO$,and $CH_3COCH_3$?

Among the aromatic isomers with the molecular formula $C_8H_8O$,one isomer $X$ gives the iodoform test,while another isomer $Y$ gives the Benedict's test. What are the structures of $X$ and $Y$ respectively?

Which of the following compounds is highly reactive towards $HCN$?