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Question

What type of chemical reaction takes place when:
(a) lime stone is heated.
(b) a magnesium ribbon is burnt in air.

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Solution

(a) When the limestone is heated, it undergoes decomposition reaction as:
CaCO3ΔCaO+CO2
(b) When magnesium ribbon is burnt in air it undergoes combination reaction with oxygen.
2Mg+O22MgO

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