Question

Both acetaldehyde and acetone will react with X reagent. Identify the reagent X.

Options

• Grignard reagent

• Tollen's reagent 

• Fehling's reagent 

• Schiff's reagent

Answer 1

Grignard reagent

Explanation:

While Tollen's reagent, Fohling's reagent, and schiff's reagent are all reduced by aldehydes, including acetaldehyde, acetaldehyde will react with Grignard reagent to produce secondary and tertiary alcohol, respectively.

\[\begin{array}{cc}
\phantom{..............................}\ce{CH3}\phantom{....................}\ce{CH3}\\
\phantom{............................}|\phantom{.......................}|\\
\ce{CH3C = O + CH3MgX -> CH3 - C - OMgX ->[H2O] CH3 - C - CH3}\\
\phantom{.}|\phantom{..............................}|\phantom{.......................}|\phantom{....}\\
\phantom{...}\ce{\underset{acetaldehyde}{H}}\phantom{..........................}\ce{H}\phantom{................}\ce{\underset{Secondary alcohol}{H}}\phantom{....}
\end{array}\]