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Isomerism Introduction | Class 10 | Notes, Video, MCQs | SM-Educate

Isomerism Introduction | Class 10 | Notes, MCQs | SM-Educate
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CS-991 · Module O-X5

Isomerism Introduction

Class X · Organic Chemistry
▶ What is Isomerism? ▶ Types of Structural Isomerism ▶ Examples and Practice
Click any video to watch on YouTube (opens in new tab)

🔄 What is Isomerism?

Isomers are compounds with the same molecular formula but a different structure or arrangement of atoms. At Class X level, we focus on structural isomerism.

📊 Types of Structural Isomerism

TypeDescriptionExample
Chain IsomerismDifferent arrangement of the carbon skeletonn-Butane vs Isobutane (both C₄H₁₀)
Position IsomerismSame functional group, different position on the chain1-Propanol vs 2-Propanol
Functional IsomerismSame molecular formula, different functional groupEthanol vs Dimethyl Ether (both C₂H₆O)

📝 Practice MCQs

Q1: n-Butane and Isobutane are examples of:
a) Position isomerism b) Chain isomerism c) Functional isomerism d) No isomerism
Show Answer
✅ b) Chain isomerism
Q2: Ethanol and Dimethyl Ether share the molecular formula C₂H₆O but have different functional groups. This is:
a) Chain isomerism b) Position isomerism c) Functional isomerism d) Geometric isomerism
Show Answer
✅ c) Functional isomerism
Q3: Isomers always have:
a) The same structure b) The same molecular formula c) The same boiling point d) The same functional group
Show Answer
✅ b) The same molecular formula
Q4: 1-Propanol and 2-Propanol differ only in the position of the -OH group. This is an example of:
a) Chain isomerism b) Position isomerism c) Functional isomerism d) Tautomerism
Show Answer
✅ b) Position isomerism
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