Class 12 Chemistry — Chapter 8: Aldehydes, Ketones and Carboxylic Acids
96 practice questions · 32 Easy · 32 Medium · 32 Hard
Practise Class 12 Chemistry Chapter 8, "Aldehydes, Ketones and Carboxylic Acids", with 96 NCERT-aligned multiple-choice questions. The set is split into 32 Easy, 32 Medium and 32 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Aldehydes, Ketones and Carboxylic Acids" is one of the chapters where reactions, named concepts, and balanced numerical work really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Aldehydes, Ketones and Carboxylic Acids, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 12 Chemistry mastery score. A few sample questions are shown below; sign in free to practise all 96.
Key concepts: Aldehydes, Ketones and Carboxylic Acids (Class 12 Chemistry)
This chapter covers the carbonyl compounds (aldehydes and ketones) and carboxylic acids — their preparation, nucleophilic addition, and characteristic reactions.
- The carbonyl group
- The polar C=O group makes aldehydes and ketones electrophilic at carbon, favouring nucleophilic addition.
- Nucleophilic addition
- Reagents like HCN, NaHSO₃ and alcohols add across C=O; aldehydes are more reactive than ketones (less steric/electronic hindrance).
- Reactions of α-hydrogen
- Aldol condensation (α-H carbonyls) and the Cannizzaro reaction (no α-H, e.g. HCHO) are key reactions.
- Oxidation & reduction
- Aldehydes are easily oxidised (Tollens', Fehling's tests distinguish them from ketones); both can be reduced to alcohols.
- Carboxylic acids
- More acidic than phenols (resonance-stabilised carboxylate); acidity increases with electron-withdrawing groups.
💡 Exam tips for Aldehydes, Ketones and Carboxylic Acids
- Aldehydes give positive Tollens' (silver mirror) and Fehling's tests; ketones do not — a key distinction.
- Aldol needs α-hydrogen; Cannizzaro occurs only with carbonyls lacking α-hydrogen.
Sample questions
Aldehyde functional group:
Terminal carbonyl with H.
Tollens' reagent gives silver mirror with:
Aldehydes oxidise; ketones don't.
Aldol condensation needs:
α-H abstracted to form enolate.
Aldehydes, Ketones and Carboxylic Acids — FAQs
What are the key concepts in Class 12 Chemistry Aldehydes, Ketones and Carboxylic Acids?+
This chapter covers the carbonyl compounds (aldehydes and ketones) and carboxylic acids — their preparation, nucleophilic addition, and characteristic reactions. Key ideas include The carbonyl group, Nucleophilic addition, Reactions of α-hydrogen, Oxidation & reduction, Carboxylic acids.
What does Class 12 Chemistry Chapter 8 (Aldehydes, Ketones and Carboxylic Acids) cover on XamBaaz?+
It covers 96 NCERT-aligned MCQs on "Aldehydes, Ketones and Carboxylic Acids" — 32 Easy, 32 Medium and 32 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Aldehydes, Ketones and Carboxylic Acids" questions free to practise?+
Yes — sign in with Google to practise "Aldehydes, Ketones and Carboxylic Acids" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Aldehydes, Ketones and Carboxylic Acids" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Practise all 96 questions free
Timed quizzes, instant scoring, streaks and XP. Sign in with Google — no card needed.
Start this chapter free →