Question

C. Write true or false. Correct the false statements.
1. In a physical change, the chemical composition of the original substance is altered.
2. The melting of wax is a physical change.
3. All changes of state are physical changes.
4. Condensation refers to the change of state from liquid to gas on cooling.
5. A chemical change is permanent and irreversible.
6. Mass is created during a chemical change.


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Answer 1

Answer:

1. False : it is chemical change which alters the chemical composition
2. True
3. False
4. False : condensation means change of gas to liquid
5. True
6. False : mass remains conserved in all the reactions as mass can nor be created nor be destroyed

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Answer 2

Answer:

1.False 2.True 3.True 4.False 5.True 6.False