Types of Chemical Reactions

Chemistry · Class 10 See the four main types of chemical reactions with a simple example of each. syllab.in · free

Types of Chemical Reactions

🧠 Remember it Combination = "join", Decomposition = "break", Displacement = "kick out", Double displacement = "swap partners", Redox = oxidation and reduction happening together.

🌏 In real life An iron gate rusting through the monsoon (iron + oxygen + water → rust) is oxidation; milk turning to curd and a firecracker bursting are chemical reactions too — each makes new substances with new properties.

📝 Quick notes Combination: two or more reactants form one product. e.g. CaO + H₂O → Ca(OH)₂. Decomposition: one reactant breaks into two or more (needs heat/light/electricity). e.g. 2FeSO₄ --heat--> Fe₂O₃ + SO₂ + SO₃. Displacement: a more reactive element displaces a less reactive one. e.g. Fe + CuSO₄ → FeSO₄ + Cu. Double displacement: two compounds exchange ions, often forming a precipitate. e.g. Na₂SO₄ + BaCl₂ → BaSO₄↓ + 2NaCl.

🎯 Test yourself Classify the reaction: Fe + CuSO₄ → FeSO₄ + Cu. A displacement reaction — the more reactive iron displaces copper.

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