classify the following as physical change or chemical change
1. burning of magnesium ribbon in air
2.burning of sulphur in air
3. electrolysis of water 4.purification of copper sulphate from impure copper sulphate by crystallization
5.preparation of sugarsolution
6.conversion of milk into curd 7.evaporation of alcohol
8. burning of coal
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1. Chemical change
2. Chemical change
3 Chemical change
4. Chrmical change
5. Physical change
6. Chemical change
7. Physical change
8. Chemical change
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