In the reaction $CH_3CHO + HCN \to CH_3CH(OH)CN \xrightarrow{H_3O^+} CH_3CH(OH)COOH$,an asymmetric center is generated. The acid obtained would be:

An organic compound $B$ is formed by the reaction of ethylmagnesium iodide $(CH_3CH_2MgI)$ with a substance $A,$ followed by treatment with dilute aqueous acid. Compound $B$ does not react with $PCC$ in dichloromethane. Identify $A$.

$CH_3CHO + HCHO \text{ (excess)} \xrightarrow{\text{Conc. } NaOH} \text{Product}$. The product is:

In which of the following reactions is a carbon$-$carbon bond $NOT$ formed during the formation of the product?

You have two $C_6H_{10}O$ ketones,$I$ and $II$. Both are optically active,but $I$ is racemized by treatment with acid and $II$ is not. Wolff-Kishner reduction of both ketones gives the same achiral hydrocarbon,formula $C_6H_{12}$. What reasonable structures may be assigned to $I$ and $II$ respectively?

Which statement is incorrect for the given reaction sequence: $CH_3-CN$ $\xrightarrow[(2) H_2O]{(1) CH_3MgBr} X$ $\xrightarrow{2,4-DNP} Y$?