Carboxylic Acids MCQs [Organic Chemistry]

By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024

MCQs-based questions and answers on Carboxylic Acids in organic chemistry. A reaction in which a carboxylic acid loses CO₂ is known as _______ .

1. Carbonylation
2. Carboxylation
3. Amination
4. Decarboxylation

Question’s Answer: Decarboxylation

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When carboxylate salts are heated with soda-lime, ______ are formed.

1. Alkynes
2. Cycloalkanes
3. Alkanes
4. Alkenes

Question’s Answer: Alkanes

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Organic compounds having carbon-carbon double bond undergo cleavage at the point of unsaturation when subjected to oxidation with alkaline KMnO₄ yield_____.

1. Aldehydes
2. Ketones
3. Carboxylic acids
4. Alcohols

Question’s Answer: Carboxylic acids

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Hydrolysis of nitriles with aqueous acid or alkali yields with a chain one carbon atom longer than the original chain

1. Carboxylic acids
2. Ketones
3. Alcohols
4. Aldehydes

Question’s Answer: Carboxylic acids

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Carbonation of Grignard reagents results in the formation of  _________ .

1. Aldehydes
2. Ketones
3. Carboxylic acids
4. Alcohols

Question’s Answer: Carboxylic acids

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Which acids is the strongest acid?

1. CH₃COOH
2. HCOOH
3. C₂H₅COOH
4. C₃H₇COOH

Question’s Answer: HCOOH

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Which is neutral amino acid?

1. Glycine
2. Lysine
3. Histidine
4. Aspartic acid

Question’s Answer: Glycine

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The amino acids which a body can synthesize are known as ___________ .

1. Essential
2. Basic
3. Acidic
4. Non-essential

Question’s Answer: Non-essential

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What is the relative order of esterification of acids?

1. RCH₂CO₂H < R₂CHCO₂H <R3CCO₂H
2. RCH₂CO₂H> R₂CHCO₂H> R3CCO₂H
3. RCH₂CO₂H < R3CCO₂H < R₂CHCO₂H
4. R₂CCO₂H > R₂CH₂CO₂H> R₂CHCO,H

Question’s Answer: RCH₂CO₂H> R₂CHCO₂H> R3CCO₂H

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Which acids is the strongest acid?

1. BrCH₂COOH
2. CICH₂COOH
3. ICH₂COOH
4. FCH₂COOH

Question’s Answer: FCH₂COOH

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Which electron- withdrawing group increase the acidity of the carboxylic acids?

1. -CI
2. -CN
3. -OH
4. All

Question’s Answer: All

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Carboxylic acids for acid halides by reacting with which of the following?

1. PCl₃
2. SOCI₂
3. PCI₅
4. All A, B, and C

Question’s Answer: All A, B, and C

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Carboxylic acids react with alcohols to produce which of the following?

1. Aldehyde
2. Ester
3. Phenol
4. Ketone

Question’s Answer: Ester

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The solution of which acid is helpful and used for seasoning of food

1. Acetic acid
2. Formic acid
3. Butanoic acid
4. Benzoic acid

Question’s Answer: Acetic acid

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The alkaline hydrolysis of an ester to form sodium salt of carboxylic acid and alcohol is known as ___________ .

1. Hydrolysis
2. Carboxylstion
3. Saponification
4. Dehydration

Question’s Answer: Saponification

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Amino acids are classified into what kind of types?

1. Neutral
2. Basic
3. Acidic
4. All types

Question’s Answer: All types

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Oxidation of primary alcohol and aldehyde yields which of the following?

1. Ketones
2. Carboxylic acids
3. Phenols
4. Oxime

Question’s Answer: Carboxylic acids

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Which compounds on hydrolysis yields acetic acid?

1. CH₃COOCOCH₃
2. CH₃C≡N
3. CH₃CO₂MgX
4. All these

Question’s Answer: All these

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When the alkoxide group of one ester is to replace by another alkoxide group by refluxing ester with excess of alcohol in the presence of mineral acid, the process is known as ___________ .

1. Hydrolysis
2. Carboxylation
3. Trans esterification
4. Dehydration

Question’s Answer: Trans esterification

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Decarboxylation of the silver salt of carboxylic acid in the presence of bromine to form alkyl bromide is known as ___________ .

1. Hunsdiecker reaction
2. Wittig reaction
3. Kolbe reaction
4. Birch reduction

Question’s Answer: Hunsdiecker reaction

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Which reagents is helpful and used to convert carboxylic acid to alcohol?

1. H₂/Ni
2. NaBH₄
3. LiAlH₄
4. Pt

Question’s Answer: LiAlH₄

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When propanoic acid treated with aqueous sodium bicarbonate, carbon dioxide is liberated. The carbon of the carbon dioxide comes from which of the following group?

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1. Methyl group
2. Carboxylic group
3. Bicarbonate
4. Methylene group

Question’s Answer: Bicarbonate

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________ undergoes decarboxylation on heating?

1. Malonic acid
2. Phthalic acid
3. Succinic acid
4. All

Question’s Answer: Malonic acid

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Reverse of esterification is known as ___.

1. Dehydration
2. Trans esterification
3. Carboxylation
4. Hydrolysis

Question’s Answer: Hydrolysis

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Caboxylic acids react with alcohols in the presence of mineral acids to forms esters. This process is known as ___________ .

1. Hydrolysis
2. Esterification
3. Carboxylation
4. Trans esterification

Question’s Answer: Esterification

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Which electron-donating group decrease the acidity of the carboxylic acids?

1. -CI
2. -CN
3. -CHi
4. –OH

Question’s Answer: -CHi

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Which acids is strong?

1. o-nitrobenzoic acid
2. m-nitrobenzoic acid
3. Benzoic acid
4. p-nitrobenzoic acid

Question’s Answer: o-nitrobenzoic acid

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Which acids is strong?

1. Benzoic acid
2. m-chlorobenzoic acid
3. p-chlorobenzoic acid
4. o-chlorobenzoic acid

Question’s Answer: o-chlorobenzoic acid

More Organic chemistry MCQs

1. Organic chemistry MCQs
2. Active Methylene Compounds MCQs
3. Alcohols and Phenols MCQs
4. Carbonyl Compounds MCQs
5. Halogenated Organic Compounds MCQs
6. Carboxylic Acids MCQs
7. Hydrocarbons MCQs
8. Nitrogen-Containing Organic Compounds MCQs
9. Polymers MCQs
10. Nomenclature of Organic Compounds MCQs
11. Organic Acids and Bases MCQs
12. Organic Spectroscopy MCQs
13. Purification and Characterization of Organic Compounds MCQs
14. Reaction Mechanism MCQs
15. Stereochemistry MCQs
16. Organic Molecules MCQs
17. CHEMISTRY MCQs From all subjects of  Chemistry

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