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Question

What type of chemical reaction takes place when i) limestone is heated?
ii) a magnesium ribbon is burnt in air?

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Solution

(i) Decomposition reaction takes place when limestone is heated
CaCO3(s)(Limestone)heat−−CaO(s)(QuickLime)+CO2(g)
(ii) Combination Reaction takes place when a magnesium ribbon is burnt in air.
2Mg(s)+O2(g)2MgO(s)

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