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NCERT Exemplar · Class 12 · Chemistry

Chapter 12: Aldehydes, Ketones and Carboxylic Acids

Practice each question, then open the answer or worked solution.

I. Multiple Choice Questions (Type-I)

12 questions
Q1Written answer

Addition of water to alkynes occurs in acidic medium and the presence of

Hg2+ ions as a catalyst. Which of the following products will be formed on

addition of water to but-1-one under these conditions.

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-1

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Worked solution

Option (ii) is the answer.

Q2Written answer

Which of the following compounds is most reactive towards nucleophilic

addition reactions?

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-2

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Worked solution

Option (i) is the answer.

Q3Multiple choice

The correct order of increasing acidic strength is _____________.

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Correct option: C
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Worked solution

Option (iii) is the answer.

Q4Multiple choice

Compound can be prepared by the reaction of _____________.

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-3

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Correct option: B
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Worked solution

Option (ii) is the answer.

Q5Multiple choice

The reagent which does not react with both, acetone and benzaldehyde.

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Correct option: C
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Worked solution

Option (iii) is the answer.

Q6Written answer

Cannizaro’s reaction is not given by _____________.

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-4

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Worked solution

Option (iv) is the answer.

Q7Written answer

Which product is formed when the compoundNCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-5 is treated with concentrated aqueous KOH solution?

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-6

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Worked solution

Option (ii) is the answer.

Q8Multiple choice

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-7

Structure of ‘A’ and type of isomerism in the above reaction are respectively.

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Correct option: D
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Worked solution

Option (iv) is the answer.

Q9Multiple choice

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-8

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Correct option: B
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Worked solution

Option (ii) is the answer.

Q10Multiple choice

Which is the most suitable reagent for the following conversion?

NCERT Exemplar Solutions of Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids-9

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Correct option: C
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Worked solution

Option (iii) is the answer.