The reaction shown below is called:
$CH_3-CHO + 4[H] \xrightarrow{Zn-Hg / \text{conc. } HCl} CH_3-CH_3 + H_2O$

The most reactive compound towards the formation of cyanohydrin on treatment with $KCN$ followed by acidification is:

What is $A$ in the following reaction?

Which one of the following is not formed when acetone reacts with $2-$pentanone in the presence of dilute $NaOH$ followed by heating?

Benzaldehyde on heating with acetone in the presence of $NaOH$ gives:

Identify the final product in the following reaction sequence: $R-CHO$ $\xrightarrow{HS-(CH_2)_3-SH}$ $\xrightarrow{n-BuLi}$ $\xrightarrow{D_2O}$ $\xrightarrow{HgCl_2/CdCO_3, H_2O} \text{Product}$