Class 11 Chemistry common misconceptions
Common NCERT Class 11 Chemistry misconceptions across 9 chapters, from Some Basic Concepts of Chemistry to Hydrocarbons: the tempting mistake, why it feels right, and a worked visual example.
How to teach Class 11 Chemistry Class 11 Chemistry questions with answers
- Chapter 1: Some Basic Concepts of Chemistry
Do equal masses contain equal numbers of molecules? — Tempting mistake: “18 g of water and 18 g of CO₂ contain the same number of molecules.”
- Chapter 2: Structure of Atom
Is an orbital a path drawn around the nucleus? — Tempting mistake: “An electron travels on the line shown for its orbital.”
- Chapter 3: Classification of Elements and Periodicity in Properties
Does an atom get bigger as electrons are added across a period? — Tempting mistake: “A chlorine atom is larger than a sodium atom because it has more electrons.”
- Chapter 4: Chemical Bonding and Molecular Structure
Do polar bonds always give a polar molecule? — Tempting mistake: “CO₂ is polar because its C=O bonds are polar.”
- Chapter 5: Thermodynamics
Does an exothermic reaction always proceed spontaneously? — Tempting mistake: “A negative enthalpy change alone guarantees spontaneity.”
- Chapter 6: Equilibrium
Does chemical equilibrium mean the reactions stop? — Tempting mistake: “The forward and reverse reactions stop at equilibrium.”
- Chapter 7: Redox Reactions
Can something be oxidised without oxygen? — Tempting mistake: “Sodium cannot be oxidised in a reaction with chlorine because there is no oxygen.”
- Chapter 8: Organic Chemistry – Some Basic Principles and Techniques
Does bond breaking always split the electrons evenly? — Tempting mistake: “When a C–Cl bond breaks, each atom always gets one shared electron.”
- Chapter 9: Hydrocarbons
Does a benzene ring react like three independent double bonds? — Tempting mistake: “Benzene should readily add bromine like an alkene.”