Important Questions Class 12 Chemistry Chapter 8

The Class 12 Chemistry Board Exam 2026 is scheduled for February 28, 2026, and students should now concentrate on high-weightage organic chemistry chapters. Chapter 8 Aldehydes, Ketones and Carboxylic Acids is one of the most scoring yet concept-heavy units in Organic Chemistry.

To score well, students must actively practice Aldehydes, Ketones And Carboxylic Acids Class 12 Important Questions rather than only reading theory. This chapter frequently appears in board exams through reaction-based questions, name reactions, reasoning problems, and competency-based MCQs. 

Structured preparation of Aldehydes, Ketones And Carboxylic Acids  Class 12 Chemistry Important Question sets ensures better retention of mechanisms and conversions.

Aldehydes, Ketones And Carboxylic Acids Class 12 Important Questions

Preparing Aldehydes, Ketones And Carboxylic Acids Class 12 Important Questions is important for scoring well in the upcoming Class 12 Chemistry board exam 2026.

This chapter is a high-weightage part of Organic Chemistry and frequently contributes reaction-based, conversion, reasoning, and competency-based questions. 

Below are the Aldehydes, Ketones And Carboxylic Acids Class 12 Chemistry Important Questions: 

Sol. (3)

But–2–en–1–al

Sol.

Sol.

74. The product obtained when benzene is treated with carbon monoxide and hydrogen chloride in presence of anhydrous AlCl3 is:

(1) Chlorobenzene

(2) Phenol

(3) Benzaldehyde

(4) Benzoic acid

Sol. (3) Benzaldehyde

75. Which among the following reduces Tollen’s reagent?

(1) Methanal

(2) Propanone

(3) Benzophenone

(4) Acetophenone

Sol. (1) Methanal 

76. How will you bring about the following conversions?

i) Toluene to Benzaldehyde

ii) Benzoic acid to Benzamide

Sol. How will you bring about the following conversions?

i) Toluene to Benzaldehyde

ii) Benzoic acid to Benzamide

77. (a) Identify the Product X

(b) Name the reaction

Sol.

78. (i) Which one is more reactive among aldehydes and ketones ?

(ii) Describe any two tests to distinguish aldehydes from ketones

Sol. (i) Aldehydes

(ii) (a) Tollen’s test: When an aldehyde is heated with Tollens’ reagent, we get a bright silver mirror.

(b) Fehling’s test: When an aldehyde is heated with equal volume of Fehling’s reagent A (aqueous solution of CuSO4) and B (alkaline sodium potassium tartarate), we get a red precipitate of cuprous oxide (Cu2O). These tests are not answered by ketones

79. Name the product obtained when Toluene is treated with CrO2Cl2 in presence of CS2.

(1) Benzaldehyde
(2) Benzoic acid
(3) Phenol
(4) Chlorobenzene

Sol. (1) Benzaldehyde

80. Identify the product formed by the catalytic reduction of propanal.

Sol. Propanal

Smart Revision Strategy Before the Chemistry Board Exam

As the exam approaches, follow this focused plan:

• Prepare a reaction summary chart.

• Revise all named reactions daily.

• Solve previous year board questions.

• Practice organic conversions regularly.

• Attempt mixed-format Class 12 Chemistry Aldehydes, Ketones And Carboxylic Acids MCQ.

Consistent practice of Aldehydes, Ketones And Carboxylic Acids Class 12 Important Questions can help secure 7–10 marks from this chapter.