Question

Burning of magnesium ribbon is a ________ change.

• A. permanent and reversible
• B. temporary and reversible
• C. temporary and irreversible
• D. permanent and irreversible

Answer 1

The correct option is D permanent and irreversible

Burning of magnesium ribbon in air is a chemical change because of the following reasons:

• It is an irreversible change, as after burning the ribbon cannot be unburnt.
• A new product is formed with new properties, i.e., $\text{[MgO]}$.
• The composition of magnesium changes.
• Heat energy is required for this chemical change.