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Aldehydes, Ketones and Carboxylic Acids — Syllabus

ICSE · Class 12 · Chemistry

What Aldehydes, Ketones and Carboxylic Acids covers in ICSE Class 12 Chemistry: 4 topics, for the 2026-27 session.

103 questions36 flashcards13 formulas & key relations5 concepts

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A flowchart summarizing the key methods for preparing carboxylic acids, showing starting materials, reagents, and products for each reaction.
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4 Topics · ICSE Class 12 Chemistry · 2026-27

Topics in Aldehydes, Ketones and Carboxylic Acids

1

1. Carbonyl Group and Basic Reactivity

  • The carbonyl group contains a carbon atom double bonded to oxygen.
  • The carbon atom of the carbonyl group is sp2 hybridised.
  • The carbonyl group is polar because oxygen is more electronegative than carbon.
2

2. Important Reactions of Aldehydes and Ketones

  • Aldehydes and ketones react with hydrogen cyanide to form cyanohydrins.
  • They react with ammonia and its derivatives to form addition products and then elimination products.
  • They react with sodium bisulphite to form bisulphite addition compounds in many cases.
3

3. Preparation of Carboxylic Acids

  • Primary alcohols and aldehydes can be oxidised to carboxylic acids by oxidising agents such as potassium permanganate and potassium dichromate.
  • Aldehydes can also be oxidised by mild oxidising agents like Tollens' reagent.
  • Nitriles on hydrolysis with acid or alkali give carboxylic acids.
4

4. Physical Properties of Carboxylic Acids

  • Lower carboxylic acids up to C4 are highly soluble in water.
  • Acids with seven or more carbon atoms are practically insoluble in water.
  • C4 to C9 acids are oily liquids with a goat-like odour.

Key Concepts

Central concept: Carbonyl Compounds and Carboxylic Acids

AldehydesKetonesCarboxylic AcidsFunctional Derivatives of Carboxylic AcidsMethods of PreparationAcidity and ResonanceReduction and OxidationDecarboxylation and Descent

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Frequently Asked Questions

What are the important topics in Aldehydes, Ketones and Carboxylic Acids for ICSE Class 12 Chemistry?
Key topics in Aldehydes, Ketones and Carboxylic Acids include Carbonyl Group and Basic Reactivity, Important Reactions of Aldehydes and Ketones, Preparation of Carboxylic Acids, Physical Properties of Carboxylic Acids. Study these first, then practise questions on each for the ICSE Class 12 board exam.
How should I revise Aldehydes, Ketones and Carboxylic Acids for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 103 practice questions on Aldehydes, Ketones and Carboxylic Acids. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 12 Chemistry Syllabus

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