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State whether the following statements are True/False.
(i) Air is necessary for combustion.
(ii) Magnesium is a non-combustible metal.
(iii) Carbon dioxide is an excellent fire extinguisher.
(iv) Calorific value of wood is higher than that of coal.
Air contains oxygen and oxygen is a supporter of combustion.
Magnesium is a combustible metal.
Carbon dioxide is an excellent fire extinguisher.
The calorific value of coal is higher than that of wood.
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