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  1. Asked: In:

    Give an example of a combination reaction.

    Ranveer brar

    When magnesium burns in air, it forms magnesium oxide. This is a combination reaction.

    When magnesium burns in air, it forms magnesium oxide. This is a combination reaction.

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  2. Asked: In:

    What is decomposition reaction?

    Ranveer brar

    When a compound decomposes to give two or more simpler substances, it is a decomposition reactions e.g. calcium carbonate on heating decomposes into calcium oxide and carbon dioxide. CaCO₃ → CaO + CO₂↑ Calcium carbonate Calcium oxide Carbon dioxide

    When a compound decomposes to give two or more simpler substances, it is a decomposition reactions e.g. calcium carbonate on heating decomposes into calcium oxide and carbon dioxide.

    CaCO₃ → CaO + CO₂↑
    Calcium carbonate Calcium oxide Carbon dioxide

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  3. Asked: In:

    Give two examples of combination reactions.

    Ranveer brar

    (i) Magnesium burns in oxygen to form magnesium oxide. 2Mg + O₂ → 2MgO + Heat (ii) Quick lime reacts with water to produce calcium hydroxide CaO + H₂O → Ca(OH)₂ + Heat

    (i) Magnesium burns in oxygen to form magnesium oxide.
    2Mg + O₂ → 2MgO + Heat
    (ii) Quick lime reacts with water to produce calcium hydroxide
    CaO + H₂O → Ca(OH)₂ + Heat

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  4. Asked: In:

    Which type of chemical reaction takes place when zinc reacts with dilute sulphuric acid?

    Ranveer brar

    This reaction is displacement reaction Zn + dil. H₂SO₄ → ZnSO₄ + H₂↑

    This reaction is displacement reaction
    Zn + dil. H₂SO₄ → ZnSO₄ + H₂↑

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