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Organic Chemistry ICSE Class 10 MCQ & Practice Questions

Practice Organic Chemistry MCQs for ICSE Class 10 Chemistry with answers, explanations, chapter revision and related ChemNexa mock tests.

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Organic Chemistry Revision Guide for ICSE Class 10 Chemistry

Organic Chemistry is part of ICSE Class 10 Chemistry preparation. A strong revision plan should combine concept review with exam-style questions so that definitions, relationships, calculations and exceptions are recalled accurately.

Use the sample MCQs on this page to check understanding, then attempt the related ChemNexa tests for broader practice. When an answer is wrong, review the explanation and return to the underlying concept before attempting another set.

Important Topics

  • Core definitions and principles
  • Important equations or relationships
  • Common applications and examples
  • Frequently confused concepts
  • Exam-style multiple-choice questions
  • Error review and targeted revision

Revision Tip

Create a one-page summary of trends, structures, reactions, exceptions and key terminology for Organic Chemistry, then test recall with mixed MCQs.

What to practise in Organic Chemistry

Concept Revision

Revise definitions, principles, equations, trends and core ideas from Organic Chemistry before attempting MCQs.

Exam-style MCQs

Use chapter-focused multiple-choice practice to improve accuracy, recall and application for ICSE Class 10 Chemistry.

Performance Practice

Attempt ChemNexa tests, review results and return to weak areas for another round of targeted revision.

Top 20 Organic Chemistry MCQs with Answers

These public questions are selected from the exact Organic Chemistry chapter, screened for topic relevance and deduplicated so repeated versions of the same MCQ are not shown publicly. Use them for quick revision, then sign in to attempt the complete test experience with more questions, results and performance review.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

1. Carbon is tetravalent because it has:

  • A. 1
  • B. 2
  • C. 4
  • D. 8
Answer: C
Explanation: Carbon forms four covalent bonds.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

2. Catenation means:

  • A. Ion formation
  • B. Self-linking of carbon atoms
  • C. Hydrogen bonding
  • D. Polymer breakdown
Answer: B
Explanation: Carbon links to itself.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

3. General formula of alkanes:

  • A. CnH2n
  • B. CnH2n+2
  • C. CnH2n-2
  • D. CnH2n+1OH
Answer: B
Explanation: Alkanes are saturated.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

4. Ethene belongs to:

  • A. Alkanes
  • B. Alkenes
  • C. Alkynes
  • D. Alcohols
Answer: B
Explanation: Ethene has a double bond.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

5. Functional group in ethanol:

  • A. -CHO
  • B. -OH
  • C. -COOH
  • D. -CO-
Answer: B
Explanation: Ethanol is an alcohol.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

6. Functional group in ethanoic acid:

  • A. -OH
  • B. -COOH
  • C. -CHO
  • D. -NH2
Answer: B
Explanation: Carboxyl group.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

7. Bromine water is decolourised by:

  • A. Methane
  • B. Ethene
  • C. Ethane
  • D. Propane
Answer: B
Explanation: Unsaturated compounds add Br2.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

8. Complete combustion of methane produces:

  • A. CO+H2
  • B. CO2+H2O
  • C. C+H2
  • D. CH3OH
Answer: B
Explanation: Complete combustion.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

9. Vinegar contains:

  • A. Methanoic acid
  • B. Ethanoic acid
  • C. Benzoic acid
  • D. Oxalic acid
Answer: B
Explanation: Acetic acid.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

10. Soap cleans by forming:

  • A. Salts
  • B. Micelles
  • C. Polymers
  • D. Alloys
Answer: B
Explanation: Micelles trap grease.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

11. Hard water reduces soap action due to:

  • A. Heat
  • B. Scum formation
  • C. Acidity
  • D. Evaporation
Answer: B
Explanation: Ca/Mg salts form scum.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

12. Polymer from ethene:

  • A. PVC
  • B. Polythene
  • C. Bakelite
  • D. Nylon
Answer: B
Explanation: Addition polymerization.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

13. Triple bond occurs in:

  • A. Ethane
  • B. Ethene
  • C. Ethyne
  • D. Methanol
Answer: C
Explanation: Ethyne contains C≡C.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

14. IUPAC name of CH3OH:

  • A. Methanal
  • B. Methanoic acid
  • C. Methanol
  • D. Methyl chloride
Answer: C
Explanation: One-carbon alcohol.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

15. IUPAC name of CH3COOH:

  • A. Ethanol
  • B. Ethanal
  • C. Ethanoic acid
  • D. Methanoic acid
Answer: C
Explanation: Two-carbon acid.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

16. Esterification forms:

  • A. Salt
  • B. Ester
  • C. Soap
  • D. Alkene
Answer: B
Explanation: Alcohol + acid -> ester.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

17. Pleasant fruity smell is due to:

  • A. Alcohols
  • B. Esters
  • C. Alkanes
  • D. Ketones
Answer: B
Explanation: Esters have fruity odour.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

18. Hydrogenation converts:

  • A. Alkanes to alkenes
  • B. Alkenes to alkanes
  • C. Alcohols to acids
  • D. Acids to esters
Answer: B
Explanation: Adds hydrogen across double bond.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

19. Catalyst used in hydrogenation:

  • A. Cu
  • B. Ni
  • C. Ag
  • D. Zn
Answer: B
Explanation: Finely divided Ni.

ICSE Class 10 Chemistry · Organic Chemistry · Very Very Hard

20. Detergents work well in:

  • A. Soft water only
  • B. Hard water also
  • C. Acids only
  • D. Alcohol
Answer: B
Explanation: No scum with hard water.

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Organic Chemistry Practice Tests

Organic Chemistry Frequently Asked Questions

How should I prepare Organic Chemistry for ICSE Class 10 Chemistry?

Revise the core concepts first, make a short list of important relationships or exceptions, and then solve chapter-focused MCQs while reviewing every error.

How can ChemNexa help with Organic Chemistry practice?

This page provides public sample questions and links to published ChemNexa tests so you can combine quick revision with structured practice.

What should I do after getting an MCQ wrong?

Identify whether the mistake came from a concept gap, calculation, unit, sign, wording or memory error, review that point, and then attempt a similar question again.

Continue with another chapter to build connected concepts and strengthen your overall Chemistry preparation.

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