Question

Q3. Classify the following changes into physical and chemical changes:
Heating of sulphur and iron Photosynthesis Drying of clothes Dissolution of quicklime
Boiling of an egg Burning of match stick
Heating of platinum wire Sublimation of naphthalene Dissolving of sugar in water Burning of fireworks

Answer 1

• Chemical change
• photosynthesis : chemical change
• drying of.. : physical change
• dissolution..: chemical change
• Boiling of.. : chemical change
• burning of.. : chemical change
• heating of platinum..: physical change
• sublimation..: physical change
• dissolving..: physical change
• burning of.. : chemical change