Question

1. A change in which a substance retains its identity is a ________[physical/chemical change.

2. Matter is added or removed during a____[chemicalphysical] change.

3. Energy required for completion of a physical change is___[released/absorbed]when the change is reversed.

4. Dissolution of lead nitrate in water is deemed as a____
[physical/chemical] change

5. A change in which matter undergoes a change but the total mass of substance
unaltered is a____[physical/chemical] change.


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Answer 1

Answer:

1) physical

2) physical

3) absorbed

4) chemical

5) physical