Question.
Classify the following as chemical or physical changes :
• Cutting of trees
• Melting of butter in a pan
• Rusting of almirah
• Boiling of water to form steam
• Passing of electric current through water and the water breaking down into hydrogen and oxygen gases
• Dissolving common salt in water
• Making a fruit salad with raw fruits, and
• Burning of paper and wood.
Classify the following as chemical or physical changes :
• Cutting of trees
• Melting of butter in a pan
• Rusting of almirah
• Boiling of water to form steam
• Passing of electric current through water and the water breaking down into hydrogen and oxygen gases
• Dissolving common salt in water
• Making a fruit salad with raw fruits, and
• Burning of paper and wood.
Solution:
Physical changes : Cutting of trees, melting of butter in a pan, boiling water to form steam, making a fruit salad with raw fruits, dissolving common salt in water.
Chemical changes : Rusting of almirah, passing of electric current through water and the water breaking down into hydrogen and oxygen gases, burning of paper and wood.
Physical changes : Cutting of trees, melting of butter in a pan, boiling water to form steam, making a fruit salad with raw fruits, dissolving common salt in water.
Chemical changes : Rusting of almirah, passing of electric current through water and the water breaking down into hydrogen and oxygen gases, burning of paper and wood.