Question

The reaction of $ C{H_3}MgBr $ on dry ice followed by acid hydrolysis gives:
A. Acetic acid
B. Formic acid
C. Acetone
D. Acetaldehyde

Answer 1

Hint :Acid hydrolysis is a hydrolysis process in which a protic acid is used to catalyze the cleavage of chemical bond followed by nucleophilic substitution reaction. The acid hydrolysis of Grignard reagent gives carboxylic acid which is used in the preparation of metal acetate.

Complete Step By Step Answer:
The reaction of Grignard reagent on dry ice followed by acid hydrolysis gives carboxylic acid that is acetic acid. In this reaction the Grignard reagent gets attached to a carbon atom and the oxygen double bond of carbon dioxide.
The reaction of acid hydrolysis of Grignard reagent can be given as:
 $ C{O_2} + C{H_3}MgBr \to C{H_3}COOMgBr{H_3}O + C{H_3}COOH + Mg(Br)OH $
The product we get is acetic acid.
So, the correct option is A.

Additional Information:
Acetic acid is also called ethanoic acid. Acetic acid is used in vinyl acetate monomer, ester production, acetic anhydride and also used as a solvent.
Applications of acid hydrolysis:
Acid hydrolysis is also used to prepare chemicals, such as monosaccharides, hydrochloric acid, sulfuric acid, trifluoroacetic acid, formic acid, nitric acid.
Hydrolysis can be done in methanol, water, or any other protic solvent. Methanol is much better at solubilizing polymeric organic materials, but there is still a chance that some carboxyl groups will be converted to methyl esters.

Note :
A Grignard reagent also called Grignard compound is a chemical compound having molecular formula as $ R - Mg - X $ , where $ R $ is an organic group generally alkyl or aryl group and $ X $ is a halogen. Some examples of Grignard reagents are methylmagnesium chloride and phenylmagnesium bromide. Industrially, Grignard reagent is used for the industrial production of Tamoxifen. On oxidation, Grignard reagents with oxygen give the magnesium organic peroxide. Hydrolysis of this material gives hydroperoxides or alcohol. Radical intermediates are involved in this reaction.