Formaldehyde when treated with $KOH$ gives methanol and potassium formate. The reaction is known as

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

$CH_3CHO + HCN$ $\xrightarrow{\text{H}^+} CH_3CH(OH)CN$ $\xrightarrow{\text{H}_3\text{O}^+} CH_3CH(OH)COOH$. In the above reaction,a chiral center is generated. What will be the nature of the resulting acid?

The major product in the following reaction sequence is

$2(CHO-COOH) \xrightarrow{NaOH} CH_2OH-COOH + HOOC-COONa$. This reaction is:

Which one of the following is produced when acetone is saturated with $HCl$ gas?