When CO2 reacts with propyl magnesium chloride followed by acid hydrolysis, the product formed is
Correct answer: A. Butanoic acid
- A. Butanoic acid
- B. Ethanoic acid
- C. Pentanoic acid
- D. Propanoic acid
Explanation
The reaction of CO2 with propyl magnesium chloride is a Grignard reaction that produces a carboxylic acid. The propyl group (C3H7-) adds to the carbon in CO2, forming a four-carbon chain, which becomes butanoic acid after acid hydrolysis. This is because propyl magnesium chloride extends the carbon chain by one carbon atom, resulting in a butanoic acid (C4H8O2) after hydrolysis. The other options represent acids that would be formed by different Grignard reagents: Ethanoic acid from methyl magnesium chloride, pentanoic acid from butyl magnesium chloride, and propanoic acid from ethyl magnesium chloride.
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About Carboxylic Acids
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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