2. Show that burning of a magnesium ribbon is a chemical change through all CAP 3. In addition to formation of new substances, what all changes can be observed during a chemical change? Give one example of each type of change.
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Burning of magnesium ribbon in air is a chemical change because:
It is an irreversible change, as after burning the ribbon cannot be unburnt.
A new product is formed with new properties, i.e. MgO
The composition of magnesium changes.
Heat energy is required for this chemical change.
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