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Question The common name and chemical name of ores of following elements are:
| S. No. | Metal | Common Name | Chemical Name |
|---|---|---|---|
| (a) | Zinc | Zinc blende | Zinc sulphide [ZnS] |
| (b) | Aluminium | Bauxite | Aluminium oxide [Al2O3.2H2O] |
| (c) | Iron | Haematite | Iron [III] oxide [Fe2O3] |
ICSE Class VII Chemistry Chapter 5 14 Marks
Metals and Non-Metals — Quick Study Guide
Elements are broadly classified as metals, non-metals, or metalloids based on their physical and chemical properties.
Key Properties
- Metals: Lustrous, malleable, ductile, sonorous, good conductors, high density
- Non-metals: Dull, brittle, poor conductors, non-sonorous, low density
- Metalloids: Properties of both (e.g., Silicon, Germanium)
Chemical Reactions
- Metal + O2 → Basic oxide (turns red litmus blue)
- Non-metal + O2 → Acidic oxide (turns blue litmus red)
- Metal + Acid → Salt + H2
Exam Tips
- Know all exceptions: Mercury (liquid), Graphite (conducts), Diamond (lustrous), Na/K (soft)
- Learn the comparison table (8 properties) thoroughly
- Practice writing equations for metal reactions
- Know uses of at least 5 metals and 5 non-metals
Bright Tutorials | ICSE Class VII Chemistry | Chapter 5: Metals and Non-Metals | Contact: 9403781999