Give two differences between a physical change and a chemical change. ii. Explain whether condensation of water vapour is a physical or a chemical change. iii. Write word equations for the following reactions: a. Breaking down/ electrolysis of water b. synthesis of water c. decomposition of sugar d. photosynthesis in plants
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I know only the first two answers
1. Physical change
It is a reversible change and is not permanent. Ex:- Water to ice.
Chemical change
It is usually irreversible and permanent. Ex:- Burning of paper.
2. The condensation of water is a physical change because it can be changed back to water by cooling.
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