Why do ionic compounds conduct electricity when molten but not solid?
Answer framework: Discuss fixed ions in solids and mobile ions in molten/aqueous states.
All Class 10 Science notes
Chapter 3 • Chemistry
Metals and Non-metals
Compare physical and chemical properties, use the reactivity series, explain ionic bonding, extraction and corrosion prevention.
Core concepts checklist
Physical properties and exceptions
Reactions with oxygen, water, acids and salt solutions
Reactivity series and displacement
Ionic compounds and their properties
Metallurgy: concentration, reduction, refining and corrosion
Formula & fact bank
2Na + 2H₂O → 2NaOH + H₂
Zn + CuSO₄ → ZnSO₄ + Cu
2ZnS + 3O₂ → 2ZnO + 2SO₂
Fe₂O₃ + 2Al → Al₂O₃ + 2Fe
Diagrams to practise
Draw with pencil, use straight label lines, add arrows and write a precise caption.
- 1Electron transfer in NaCl
- 2Reactivity-series ladder
- 3Electrolytic refining of copper
CBSE examiner focus
- Use reactivity to predict displacement and extraction method
- Differentiate roasting and calcination with equations
- Explain ionic properties using strong electrostatic forces
Board-style practice
Describe extraction of a moderately reactive metal from its sulphide ore.
Answer framework: Concentration, roasting, reduction and refining with balanced representative equations.
Turn revision into marks with Eduvista
Use this guide for recall, then practise timed answers and get feedback. Eduvista combines visual notes, NCERT clarity, board-pattern tests and personal doubt support.