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Burning of magnesium ribbon is a chemical change as chemical composition of one of the compound is changing and the chemical reaction associated with it is. Mg + (1/2) O2 â MgO. here the magnesium ribbon is burnt and magnesium oxide is formed.
A Chemical change may also cause a physical change; a physical change alone cannot lead to a chemical change. 3. A Physical change is superficial and can possibly be reversed; a chemical change is complete and permanent.