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12th Class Chemistry Chapter 13 MCQs with Answers

12th Class Chemistry Chapter 13 MCQs

Ace your knowledge of Carboxylic Acids with 12th Class Chemistry Chapter 13 MCQs. Practice properties, acidity, and esterification reactions. Keywords like carboxylic acid quiz, chemistry MCQs, and organic acid test make this resource valuable.

Carboxylic acids contain which functional group?
a) Hydroxyl group (OH)
b) Carbonyl group (C=O)
c) Carboxyl group (COOH)
d) Amine group (NH2)

Answer
c) Carboxyl group (COOH)

Which of the following is the general formula for carboxylic acids?
a) R-CO-R
b) R-OH
c) R-CO-H
d) R-COOH

Answer
d) R-COOH

In the carboxyl group (COOH), the carbon atom is bonded to:
a) One oxygen atom and one hydrogen atom
b) Two oxygen atoms
c) One oxygen atom and one alkyl group
d) One oxygen atom and one carbon atom

Answer
a) One oxygen atom and one hydrogen atom

Which of the following compounds is the simplest carboxylic acid?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
a) Methanoic acid

Which of the following compounds is commonly known as formic acid?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
a) Methanoic acid

Which of the following compounds is commonly known as acetic acid?
a) Methanoic acid
b) Ethanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
b) Ethanoic acid

1
Carboxylic acids are characterized by the presence of the carboxyl group, which is a combination of:
a) Carbon and hydrogen
b) Carbon and oxygen
c) Carbon and nitrogen
d) Carbon and sulfur

Answer
b) Carbon and oxygen

The functional group of a carboxylic acid is a(n):
a) Alcohol group
b) Carbonyl group
c) Carboxyl group
d) Amine group

Answer
c) Carboxyl group

Carboxylic acids are weak acids because they:
a) Are not soluble in water
b) Are insoluble in water
c) Do not ionize completely in water
d) Ionize completely in water

Answer
c) Do not ionize completely in water

Which of the following is a product of the neutralization reaction between a carboxylic acid and a base?
a) Alcohol
b) Ether
c) Ester
d) Salt

Answer
d) Salt

Which of the following compounds is a product of the neutralization reaction between acetic acid and sodium hydroxide?
a) Ethanol
b) Sodium acetate
c) Ethyl acetate
d) Sodium ethoxide

Answer
b) Sodium acetate

Which of the following compounds is formed when a carboxylic acid reacts with an alcohol in the presence of an acid catalyst?
a) Alcohol
b) Ether
c) Ester
d) Salt

Answer
c) Ester

Which of the following reagents can be used to distinguish between carboxylic acids and alcohols?
a) Fehling’s solution
b) Tollens’ reagent
c) Lucas reagent
d) Sodium bicarbonate solution

Answer
d) Sodium bicarbonate solution

Carboxylic acids react with sodium bicarbonate (NaHCO3) to produce:
a) Alcohols
b) Ethers
c) Esters
d) Salts

Answer
d) Salts

Which of the following is a carboxylic acid salt?
a) Ethanol
b) Sodium acetate
c) Ethyl acetate
d) Sodium ethoxide

Answer
b) Sodium acetate

Which of the following is the IUPAC name for CH3COOH?
a) Ethanoic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
a) Ethanoic acid

Which of the following is the IUPAC name for HCOOH?
a) Ethanoic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
b) Methanoic acid

Which of the following is the IUPAC name for CH3CH2COOH?
a) Ethanoic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
c) Propanoic acid

Carboxylic acids can be prepared by the oxidation of:
a) Aldehydes
b) Ketones
c) Alcohols
d) Esters

Answer
c) Alcohols

The oxidation of a primary alcohol produces:
a) An aldehyde
b) A ketone
c) A carboxylic acid
d) An ester

Answer
c) A carboxylic acid

The oxidation of a secondary alcohol produces:
a) An aldehyde
b) A ketone
c) A carboxylic acid
d) An ester

Answer
b) A ketone

The oxidation of a tertiary alcohol produces:
a) An aldehyde
b) A ketone
c) A carboxylic acid
d) An ester

Answer
d) An ester

Which of the following is a product of the oxidation of ethanol?
a) Ethanoic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
a) Ethanoic acid

Which of the following is a product of the oxidation of propan-1-ol?
a) Ethanoic acid
b) Methanoic acid
c) Propanoic acid
d) Butanoic acid

Answer
c) Propanoic acid

Carboxylic acids can be reduced to form:
a) Alcohols
b) Aldehydes
c) Ketones
d) Esters

Answer
a) Alcohols

Which of the following reagents can be used to reduce a carboxylic acid to an alcohol?
a) H2SO4
b) NaBH4
c) LiAlH4
d) H2/Pt

Answer
c) LiAlH4

Which of the following compounds is a product of the reduction of ethanoic acid?
a) Ethanol
b) Methanol
c) Propanol
d) Butanol

Answer
a) Ethanol

Carboxylic acids undergo nucleophilic addition-elimination reactions to form:
a) Alcohols
b) Ethers
c) Esters
d) Aldehydes

Answer
c) Esters

Which of the following compounds is a product of the reaction between a carboxylic acid and an alcohol in the presence of an acid catalyst?
a) Alcohol
b) Ether
c) Ester
d) Salt

Answer
c) Ester

The reaction between a carboxylic acid and an alcohol in the presence of an acid catalyst is called:
a) Esterification
b) Hydration
c) Acetalization
d) Cyanohydrin formation

Answer
a) Esterification

Which of the following is the major product obtained when a carboxylic acid is heated with excess alcohol in the presence of an acid catalyst?
a) Alcohol
b) Ether
c) Ester
d) Salt

Answer
c) Ester

The process of converting an ester back to the original carboxylic acid and alcohol is called:
a) Hydrolysis
b) Reduction
c) Dehydration
d) Oxidation

Answer
a) Hydrolysis

Which of the following is a product of the hydrolysis of an ester?
a) Carboxylic acid
b) Alcohol
c) Aldehyde
d) Ketone

Answer
a) Carboxylic acid

Which of the following reagents can be used to hydrolyze an ester?
a) H2SO4
b) H2O
c) NaBH4
d) LiAlH4

Answer
b) H2O

The reaction between a carboxylic acid and thionyl chloride (SOCl2) produces:
a) An alcohol
b) An aldehyde
c) An amine
d) An acyl chloride

Answer
d) An acyl chloride

Which of the following compounds is an acyl chloride?
a) Ethanol
b) Methanol
c) Propanoyl chloride
d) Butanol

Answer
c) Propanoyl chloride

The reaction between a carboxylic acid and an amine produces:
a) An alcohol
b) An aldehyde
c) An amide
d) An acyl chloride

Answer
c) An amide

Which of the following compounds is an amide?
a) Ethanol
b) Methanol
c) Propanamide
d) Butanol

Answer
c) Propanamide

Carboxylic acids react with alcohols in the presence of an acid catalyst to form:
a) Aldehydes
b) Ethers
c) Esters
d) Acyl chlorides

Answer
c) Esters

Which of the following reagents can be used to convert a carboxylic acid to its corresponding ester?
a) H2SO4
b) H2O
c) NaBH4
d) CH3OH

Answer
d) CH3OH

Carboxylic acids can undergo decarboxylation to produce:
a) Alcohols
b) Aldehydes
c) Ketones
d) Alkanes

Answer
d) Alkanes

Which of the following compounds is a product of the decarboxylation of ethanoic acid?
a) Ethanol
b) Methanol
c) Methane
d) Ethane

Answer
c) Methane

Carboxylic acids react with alcohols to form:
a) Ethers
b) Esters
c) Acyl chlorides
d) Amides

Answer
b) Esters

Which of the following reagents can be used to convert a carboxylic acid to its corresponding acyl chloride?
a) H2SO4
b) H2O
c) NaBH4
d) SOCl2

Answer
d) SOCl2

The process of converting an acyl chloride back to the original carboxylic acid is called:
a) Hydrolysis
b) Reduction
c) Dehydration
d) Decarboxylation

Answer
a) Hydrolysis

Which of the following is a product of the hydrolysis of an acyl chloride?
a) Carboxylic acid
b) Alcohol
c) Aldehyde
d) Ketone

Answer
a) Carboxylic acid

The reaction between a carboxylic acid and a Grignard reagent produces:
a) An alcohol
b) An aldehyde
c) A ketone
d) A carboxylic acid

Answer
c) A ketone

Which of the following compounds is a product of the reaction between a carboxylic acid and a Grignard reagent?
a) Ethanol
b) Methanol
c) Propanone
d) Butanol

Answer
c) Propanone

Carboxylic acids react with alcohols in the presence of a Lewis acid catalyst to form:
a) Aldehydes
b) Ethers
c) Esters
d) Acyl chlorides

Answer
c) Esters

Which of the following reagents can be used to convert a carboxylic acid to its corresponding ester in the presence of a Lewis acid catalyst?
a) H2SO4
b) H2O
c) NaBH4
d) BF3

Answer
d) BF3

The process of converting an ester back to the original carboxylic acid and alcohol in the presence of a Lewis acid catalyst is called:
a) Hydrolysis
b) Reduction
c) Dehydration
d) Decarboxylation

Answer
a) Hydrolysis

Which of the following is a product of the hydrolysis of an ester in the presence of a Lewis acid catalyst?
a) Carboxylic acid
b) Alcohol
c) Aldehyde
d) Ketone

Answer
a) Carboxylic acid

Carboxylic acids react with ammonia or amines to form:
a) Alcohols
b) Aldehydes
c) Amides
d) Carboxylic acid salts

Answer
c) Amides

Which of the following compounds is a product of the reaction between a carboxylic acid and ammonia?
a) Ethanol
b) Methanol
c) Propanamide
d) Butanol

Answer
c) Propanamide

Which of the following reagents can be used to convert a carboxylic acid to its corresponding amide?
a) H2SO4
b) H2O
c) NaBH4
d) NH3

Answer
d) NH3

Carboxylic acids can undergo decarboxylation to produce:
a) Alcohols
b) Aldehydes
c) Ketones
d) Alkanes

Answer
d) Alkanes

Which of the following compounds is a product of the decarboxylation of ethanoic acid?
a) Ethanol
b) Methanol
c) Methane
d) Ethane

Answer
c) Methane

Carboxylic acids react with alcohols to form:
a) Ethers
b) Esters
c) Amides
d) Acyl chlorides

Answer
b) Esters

Which of the following reagents can be used to convert a carboxylic acid to its corresponding ester?
a) H2SO4
b) H2O
c) NaBH4
d) CH3OH

Answer
d) CH3OH

Carboxylic acids can be reduced to form:
a) Alcohols
b) Aldehydes
c) Ketones
d) Esters

Answer
a) Alcohols

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