Identify the products of the following reaction: $HCHO + C_6H_5CHO \xrightarrow[ii) H_3O^{+}]{i) conc. NaOH} \text{Products}$

Identify the product $Y$ in the following reaction: $CH_3-CO-CH_3 + 3NaOI \xrightarrow{\Delta} Y + CH_3-COONa + 2NaOH$

Write about the Wolff-Kishner reduction reaction. Or,write the reduction reaction of aldehydes and ketones by the Wolff-Kishner reduction reaction.

Toluene $\xrightarrow[(2) \ H_3O^{+}]{(1) \ CrO_2Cl_2 / CS_2} X$ $\xrightarrow{\text{Conc. } NaOH} Y + Z$. The correct statements about $Y$ and $Z$ are:
$A. \quad Y$ is a secondary alcohol
$B. \quad Y$ is the reduction product of $X$
$C. \quad Z$ on heating with soda lime gives benzene
$D. \quad Y$ does not give $H_2$ gas with $Na$ metal

Explain the mechanism of nucleophilic addition reactions of aldehyde and ketone compounds.

What is the final product $A$ in the following reaction sequence?