Compound $CH_3-CO-CH_2-OH$ reduces:

Clemmensen reduction involves the conversion of $ >C=O $ to $ >CH_2 $ in the presence of:

Which one of the following compounds is the best choice for being prepared by an efficient mixed aldol addition reaction?

$A$ molecule $(X)$ with the following structure is hydrolyzed under mild acidic conditions to produce $(Y)$ and $(Z)$. Identify the correct statements about $(Y)$ and $(Z)$ from the following list:
$(A)$ Both $(Y)$ and $(Z)$ have the same molar mass.
$(B)$ Both $(Y)$ and $(Z)$ give a positive Tollens' test.
$(C)$ Both $(Y)$ and $(Z)$ give a positive iodoform test.
$(D)$ Both $(Y)$ and $(Z)$ react with $2,4$-dinitrophenylhydrazine to form a hydrazone derivative.

Which of the following is a hemiacetal?

The conversion of $X$ into $Y$ is an example of which reaction?