In the reaction $R - X$ $\xrightarrow[\text{alcoholic}]{KCN} A$ $\xrightarrow[\Delta]{H_2O/H^\oplus} B$,product $(B)$ is

$RMgX + CO_2$ $\xrightarrow[\text{dry}]{ \text{ether} } Y$ $\xrightarrow{ H_3O^{+} } RCOOH$
What is $Y$ in the above reaction?

Acetic acid is manufactured by the fermentation of

What is the final product of the following reaction sequence?
$C_4H_8$ $\xrightarrow[\text{peroxide}]{\text{HBr}} X$ $\xrightarrow[\text{(ii) } CO_2]{\text{(i) Mg/dry ether, (iii) } H_3O^+} Y$

What is the catalyst used in the conversion of acetaldehyde to acetic acid?

Hydrolysis of acetonitrile in acidic medium produces