Question

hlp me to identify physical or chemical changes ... ....i)production of bio gas ii)electrolysis of acidified water iii)plucking of fruit iv)manufacture of salt from sea water v) burning of petrol vi) butter going rancid vii)Clotting of blood viii) burning of cooking gas ix)glow of a tube light x) making of wine xi) dissolving salt in water xii)blue crystals of copper sulphate are formed on vooling a conc.sol of copper sulphate ​

Answer 1

Answer:

1. chemical change
2. chemical as well as physical changes as it can be a reversible reaction
3. physical change
4. physical change
5. chemical change
6. chemical change
7. physical change
8. both chemical as well as physical change because when LPG comes out of cylinder and is converted from liquid to gaseous state it is a physical change. When the gas burns in air it is a chemical change.
9. physical change
10. chemical change
11. chemical change
12. chemical change

Answer 2

Answer:

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