Organic Chemistry - Carboxylic Acids
Q. What is the IUPAC name of the carboxylic acid with the formula C3H6O2? (2023)
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A.
Propanoic acid
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B.
Butanoic acid
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C.
Acetic acid
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D.
Formic acid
Solution
The IUPAC name of C3H6O2 is Propanoic acid, which has a three-carbon chain.
Correct Answer: A — Propanoic acid
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Q. Which carboxylic acid is known for its role in the Krebs cycle? (2019)
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A.
Citric acid
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B.
Acetic acid
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C.
Lactic acid
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D.
Formic acid
Solution
Citric acid plays a crucial role in the Krebs cycle, which is a key metabolic pathway.
Correct Answer: A — Citric acid
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Q. Which of the following carboxylic acids has the highest boiling point? (2020)
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A.
Formic acid
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B.
Acetic acid
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C.
Propanoic acid
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D.
Butanoic acid
Solution
Butanoic acid has the highest boiling point due to its longer carbon chain and greater molecular weight.
Correct Answer: D — Butanoic acid
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Q. Which of the following is the simplest carboxylic acid? (2020)
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A.
Methanoic acid
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B.
Ethanoic acid
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C.
Propanoic acid
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D.
Butanoic acid
Solution
Methanoic acid (HCOOH) is the simplest carboxylic acid, containing only one carbon atom.
Correct Answer: A — Methanoic acid
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Q. Which reaction is characteristic of carboxylic acids? (2021)
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A.
Esterification
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B.
Hydrogenation
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C.
Halogenation
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D.
Dehydration
Solution
Esterification is a characteristic reaction of carboxylic acids, where they react with alcohols to form esters.
Correct Answer: A — Esterification
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Q. Which reaction is used to prepare carboxylic acids from alcohols? (2020)
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A.
Oxidation
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B.
Reduction
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C.
Hydrolysis
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D.
Dehydration
Solution
Oxidation of alcohols leads to the formation of carboxylic acids.
Correct Answer: A — Oxidation
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