Q 1.     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

Answers (1)
M manish

Physical changes-

  • cutting of trees
  • melting of butter in a pan
  • boiling of water to form steam
  • dissolving common salt in water
  • making a fruit salad with raw fruits

 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  

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