The given reaction is: $R_2C=O + HCN \rightarrow R_2C(OH)CN$

The reagent$(s)$ which can be used to distinguish acetophenone from benzophenone is (are):

Identify the product of the following reaction: $Formaldehyde + Benzaldehyde \xrightarrow[H_3O^{+}]{conc. NaOH} \text{product}$

The above conversion can be carried out by:

Write down functional isomers of a carbonyl compound with molecular formula $C_3H_6O$. Which isomer will react faster with $HCN$ and why? Explain the mechanism of the reaction also. Will the reaction lead to the completion with the conversion of whole reactant into product at reaction conditions? If a strong acid is added to the reaction mixture what will be the effect on concentration of the product and why?

The $K_{eq.}$ values in $HCN$ addition to the following aldehydes are in the order: