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 found in citrus fruits? (2023)
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A.
Acetic acid
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B.
Citric acid
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C.
Lactic acid
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D.
Formic acid
Solution
Citric acid is the carboxylic acid found in citrus fruits, contributing to their sour taste.
Correct Answer: B — Citric 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 carboxylic acid is known for its use in the food industry as a preservative? (2023)
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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
Acetic acid is widely used in the food industry as a preservative and flavoring agent.
Correct Answer: B — Acetic acid
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Q. Which carboxylic acid is known for its use in the production of biodiesel? (2023)
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A.
Palmitic acid
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B.
Stearic acid
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C.
Oleic acid
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D.
Linoleic acid
Solution
Oleic acid is commonly used in the production of biodiesel due to its favorable properties.
Correct Answer: C — Oleic acid
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Q. Which carboxylic acid is known for its use in the production of nylon? (2019)
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A.
Adipic acid
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B.
Citric acid
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C.
Lactic acid
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D.
Acetic acid
Solution
Adipic acid is used in the production of nylon, particularly nylon 6,6.
Correct Answer: A — Adipic acid
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Q. Which carboxylic acid is responsible for the sour taste in citrus fruits? (2020)
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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 is responsible for the sour taste in citrus fruits.
Correct Answer: A — Citric acid
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Q. Which carboxylic acid is responsible for the sour taste in sour milk? (2020)
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A.
Lactic acid
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B.
Acetic acid
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C.
Citric acid
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D.
Formic acid
Solution
Lactic acid is produced during the fermentation of lactose in sour milk, giving it a sour taste.
Correct Answer: A — Lactic acid
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Q. Which carboxylic acid is used in the production of nylon? (2023)
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A.
Hexanoic acid
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B.
Adipic acid
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C.
Citric acid
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D.
Acetic acid
Solution
Adipic acid is used in the production of nylon, specifically nylon-6,6.
Correct Answer: B — Adipic acid
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Q. Which of the following carboxylic acids has a pungent odor? (2022)
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A.
Acetic acid
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B.
Butanoic acid
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C.
Formic acid
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D.
Propanoic acid
Solution
Butanoic acid has a pungent odor, often described as rancid butter.
Correct Answer: B — Butanoic 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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