Q. Which of the following is a dicarboxylic acid?
A.
Acetic acid
B.
Oxalic acid
C.
Formic acid
D.
Butanoic acid
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Solution
Oxalic acid (C2H2O4) is a dicarboxylic acid as it contains two carboxylic acid groups.
Correct Answer: B — Oxalic acid
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Q. Which of the following is a property of carboxylic acids?
A.
They are basic
B.
They have high boiling points
C.
They are insoluble in water
D.
They do not form hydrogen bonds
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Solution
Carboxylic acids have high boiling points due to hydrogen bonding.
Correct Answer: B — They have high boiling points
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Q. Which of the following is NOT a derivative of carboxylic acid?
A.
Ester
B.
Amide
C.
Acid chloride
D.
Alcohol
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Solution
Alcohols are not derivatives of carboxylic acids; they are separate functional groups.
Correct Answer: D — Alcohol
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Q. Which of the following is the correct IUPAC name for CH3COOH?
A.
Methanoic acid
B.
Ethanoic acid
C.
Propanoic acid
D.
Butanoic acid
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Solution
The compound CH3COOH is known as Ethanoic acid, which is the IUPAC name for acetic acid.
Correct Answer: B — Ethanoic acid
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Q. Which of the following is the functional group of carboxylic acids?
A.
-OH
B.
-COOH
C.
-CHO
D.
-C=O
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Solution
Carboxylic acids contain the -COOH functional group.
Correct Answer: B — -COOH
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Q. Which of the following is the strongest acid?
A.
Formic acid
B.
Acetic acid
C.
Propanoic acid
D.
Butanoic acid
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Solution
Formic acid (HCOOH) is stronger than acetic acid (CH3COOH) due to the presence of a hydrogen atom directly attached to the carbonyl carbon, which stabilizes the conjugate base.
Correct Answer: A — Formic acid
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Q. Which of the following reactions can be used to prepare carboxylic acids?
A.
Hydrolysis of esters
B.
Reduction of ketones
C.
Oxidation of alcohols
D.
All of the above
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Solution
Carboxylic acids can be prepared by the hydrolysis of esters.
Correct Answer: A — Hydrolysis of esters
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Q. Which of the following statements about carboxylic acids is true?
A.
They are always soluble in water
B.
They have higher boiling points than alcohols
C.
They can form hydrogen bonds
D.
All of the above
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Solution
Carboxylic acids can form hydrogen bonds due to the presence of the -COOH group, which contributes to their higher boiling points compared to hydrocarbons.
Correct Answer: C — They can form hydrogen bonds
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Q. Which of the following statements is true about carboxylic acids?
A.
They are always soluble in water
B.
They have higher boiling points than alcohols
C.
They cannot form hydrogen bonds
D.
They are weak bases
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Solution
Carboxylic acids have higher boiling points than alcohols due to the ability to form dimers through hydrogen bonding.
Correct Answer: B — They have higher boiling points than alcohols
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Q. Which reagent is commonly used to convert a carboxylic acid to an acid chloride?
A.
SOCl2
B.
PCl5
C.
PCl3
D.
All of the above
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Solution
All of the listed reagents can convert carboxylic acids to acid chlorides.
Correct Answer: D — All of the above
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Q. Which reagent is commonly used to convert a carboxylic acid to an alcohol?
A.
LiAlH4
B.
NaBH4
C.
H2/Pd
D.
SOCl2
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Solution
Lithium aluminum hydride (LiAlH4) is a strong reducing agent that can reduce carboxylic acids to primary alcohols.
Correct Answer: A — LiAlH4
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Q. Which reagent is commonly used to convert carboxylic acids to alcohols?
A.
LiAlH4
B.
NaBH4
C.
H2/Pd
D.
SOCl2
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Solution
Lithium aluminum hydride (LiAlH4) is used to reduce carboxylic acids to alcohols.
Correct Answer: A — LiAlH4
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Q. Which reagent is used to convert a carboxylic acid to an alcohol?
A.
LiAlH4
B.
NaBH4
C.
H2SO4
D.
KMnO4
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Solution
Lithium aluminum hydride (LiAlH4) is used to reduce carboxylic acids to alcohols.
Correct Answer: A — LiAlH4
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