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Get Answers to all your Questions
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)
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
View full answer
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- 1500 families with 2 children were selected randomly, and the following data were recorded: 1 girl
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