Practical Work

ICSE · Class 9 · Chemistry

Quick revision notes for Practical Work — ICSE Class 9 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

43 questions25 flashcards5 concepts

Key Topics to Revise

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

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Full Notes

Key Concepts

Ten important gases can be identifiedDifferent compounds show characteristic changes whenDilute sulphuric acid reacts differentlyA flame test uses a cleanHard water contains dissolved calcium

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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.

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Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All 9 chapters — ICSE Class 9 Chemistry Revision Notes