Practical Work
ICSE · Class 9 · Chemistry
Complete topic list for Practical Work in ICSE Class 9 Chemistry. Key concepts, sub-topics, and what to focus on for board exams.
Topics in Practical Work
Gas Identification and Recognition
- Ten important gases must be identified: H₂, O₂, CO₂, Cl₂, HCl, SO₂, H₂S, NH₃, H₂O vapour, NO₂
- Each gas has unique physical properties: colour, odour, and chemical tests
- Preparation methods involve specific chemical reactions
Action of Heat on Compounds
- Different compound types show characteristic changes on heating
- Carbonates decompose to give metal oxides and CO₂ (except Na₂CO₃, K₂CO₃)
- Hydrated salts lose water of crystallization
Action of Dilute Sulphuric Acid
- Four main types of substances react with dilute H₂SO₄: metals, carbonates, sulphides, sulphites
- Each type produces a characteristic gas
- Observations include effervescence, gas properties, and specific tests
Flame Tests
- Flame tests identify metal ions by characteristic colors
- Platinum wire must be cleaned with conc. HCl before use
- Blue glass helps distinguish sodium (yellow disappears) from other metals
Key Concepts
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What are the important topics in Practical Work for ICSE Class 9 Chemistry?
Practical Work covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Practical Work — ICSE Class 9 Chemistry?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
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