Relevant Titles

1. Isomerism and Purification Class 11 Chemistry MCQs with Answers

2. CBSE Class 11 Organic Chemistry Online Practice Test – Chapter 12

3. Important MCQs on Isomerism and Purification for Class 11 CBSE

4. NCERT-Based Class 11 Chemistry Quiz: Isomerism & Purification

5. CBSE Class 11 Chemistry Test – Isomerism and Organic Compound Purification

Introduction Paragraph 

Enhance your understanding of Isomerism and Purification with this comprehensive set of CBSE Class 11 Chemistry MCQs, designed strictly according to the NCERT syllabus. This topic from Chapter 12: Organic Chemistry – Some Basic Principles and Techniques covers the essential concepts of structural and stereoisomerism, including optical and geometrical isomerism, and the various techniques used for purification of organic compounds such as distillation, sublimation, crystallization, and chromatography.

Each question in this online practice test comes with detailed explanations to help students learn the concepts behind every answer. These MCQs are ideal for CBSE Class 11 board exam preparation and also benefit students preparing for NEET and JEE.

Test your conceptual clarity, improve accuracy, and master the fundamentals of organic chemistry with these Isomerism and Purification Class 11 Chemistry MCQs — designed to match the CBSE board exam standards.

Sample MCQs (with Answers and Explanations):

Q1. Which type of isomerism occurs due to restricted rotation around a double bond?
A) Chain isomerism B) Geometrical isomerism C) Optical isomerism D) Structural isomerism
✅ Answer: B) Geometrical isomerism
💡 Explanation: Geometrical isomerism (cis-trans) arises due to restricted rotation around a C=C double bond.

Q2. Which of the following compounds exhibits optical isomerism?
A) 2-Butanol B) Ethanol C) Propane D) Butane
✅ Answer: A) 2-Butanol
💡 Explanation: 2-Butanol contains a chiral carbon atom and exists as two enantiomers, showing optical activity.

Q3. The method used to purify a solid that sublimes easily is:
A) Crystallization B) Distillation C) Sublimation D) Filtration
✅ Answer: C) Sublimation
💡 Explanation: Sublimation separates volatile solids from non-volatile impurities without melting.

Q4. Which technique separates organic liquids based on boiling point differences?
A) Chromatography B) Distillation C) Filtration D) Extraction
✅ Answer: B) Distillation
💡 Explanation: Distillation separates miscible liquids with different boiling points effectively.

Q5. Enantiomers are compounds that:
A) Are superimposable mirror images B) Are non-superimposable mirror images C) Differ in molecular formula D) Have the same physical properties always
✅ Answer: B) Are non-superimposable mirror images
💡 Explanation: Enantiomers have identical physical properties but differ in the direction of optical rotation.