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Chemical Changes and Reactions — Concept Maps

ICSE · Class 9 · Chemistry

4 concept maps of Chemical Changes and Reactions for ICSE Class 9 Chemistry, each also written out as a text outline.

43 questions36 flashcards9 formulas & key relations5 concepts

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An infographic illustrating various conditions required for chemical reactions to occur, such as close contact, solution, heat, light, electricity, pressure, and catalysts, with a simple example for e
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4 Concept Maps

Chemical Reactions Overview

Chemical Reactions Overview

The map in words

  • CHEMICAL REACTIONS
    • Definition
      • Breaking bonds in reactants
      • Forming new bonds in products
      • Permanent change
    • Conditions
      • Mixing/Close contact
      • Solution state
      • Heat
      • Light
      • Electricity
      • Pressure
      • Catalyst
    • Observable Changes
      • Gas evolution
      • Color change
      • Precipitate
      • Change of state
    • Types
      • Combination
        • Element+Element
        • Element+Compound
        • Compound+Compound
      • Decomposition
        • Thermal
        • Photochemical
        • Electrochemical
      • Displacement
        • Uses Reactivity series
        • Single displacement
      • Double Decomposition
        • Precipitation
        • Neutralization
        • Hydrolysis
    • Energy
      • Exothermic
        • Heat released
        • Temp increases
      • Endothermic
        • Heat absorbed
        • Temp decreases

Thermal Decomposition of Metal Nitrates — Correct Product Prediction

Thermal Decomposition of Metal Nitrates — Correct Product Prediction

The map in words

  • Metal Nitrate is Heated
    • Which metal?
      • K or Na: Metal Nitrite + Oxygen
        • 2KNO3 gives 2KNO2 + O2
      • Ca Mg Al Zn Fe Pb Cu: Metal Oxide + NO2 + O2
        • 2Pb-NO3-2 gives 2PbO + 4NO2 + O2
      • Hg or Ag: Metal + NO2 + O2
        • 2AgNO3 gives 2Ag + 2NO2 + O2

Types of Chemical Reactions — Master Mind Map

Types of Chemical Reactions — Master Mind Map

The map in words

  • Chemical Reactions
    • Direct Combination
      • A plus B gives AB
      • Wedding Analogy
      • Mg plus O2 gives MgO
      • CO plus O2 gives CO2
    • Decomposition
      • AB gives A plus B
      • Divorce Analogy
      • Thermal by Heat
        • CaCO3 gives CaO plus CO2
        • 2HgO gives 2Hg plus O2
      • Photolysis by Light
        • 2AgNO3 gives 2Ag plus O2
      • Electrolysis by Current
        • 2H2O gives 2H2 plus O2
      • Thermal Dissociation
        • NH4Cl gives NH3 plus HCl
        • Reversible
    • Displacement
      • A plus BC gives AC plus B
      • Bully Analogy
      • Fe plus CuSO4 gives FeSO4 plus Cu
      • Activity Series
        • Most Active: K Na Ca
        • Middle: Zn Fe Pb
        • Least Active: Cu Hg Ag Au Pt
    • Double Decomposition
      • AB plus CD gives AD plus CB
      • Partner Swap Analogy
      • Precipitation
        • AgNO3 plus NaCl gives AgCl ppt
        • BaCl2 plus H2SO4 gives BaSO4 ppt
      • Neutralization
        • Acid plus Base gives Salt plus Water
        • H plus OH gives H2O

Chemical change is the breaking of old bonds and formation of new bonds that creates new substances, often with energy change and observable signs such as gas, colour change, precipitate, or change of state.

Chemical change is the breaking of old bonds and formation of new bonds that creates new substances, often with energy change and observable signs such as gas, colour change, precipitate, or change of state.

The map in words

  • Chemical change is the breaking of old bonds and formation of new bonds that creates new substances, often with energy change and observable signs such as gas, colour change, precipitate, or change of state.
    • Chemical reaction
    • Conditions for reaction
    • Observable changes
    • Direct combination
    • Decomposition
    • Displacement
    • Double decomposition
    • Energy changes

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Frequently Asked Questions

What are the important topics in Chemical Changes and Reactions for ICSE Class 9 Chemistry?
Key topics in Chemical Changes and Reactions include Chemical Reaction and Its Signs, Types of Chemical Reactions, Decomposition, Reversible Reactions, and Thermal Dissociation, Catalysts, Promoters, and Activity Series. Study these first, then practise questions on each for Class 9 exams.
What do the concept maps for Chemical Changes and Reactions show?
The 4 maps show how the ideas in Chemical Changes and Reactions connect: Chemical Reactions Overview; Thermal Decomposition of Metal Nitrates — Correct Product Prediction. Each map is also written out as an outline on this page.
How should I revise Chemical Changes and Reactions for Class 9 exams?
Learn the core ideas first, then work through the 43 practice questions on Chemical Changes and Reactions. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

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

More resources for Chemical Changes and Reactions

All ICSE Class 9 Chemistry Concept Maps

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