Question

2) Classify the following as physical or chemical changes:

d) Burning of magnesium ribbon in the air

Answer 1

• Burning of magnesium ribbon in the air involves the formation of white colored powder named Magnesium oxide ($\mathrm{MgO}$).
• A new substance is formed and the process is irreversible.
• So, the burning of magnesium ribbon in the air is a chemical change.