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Fill in the blanks:
a)a change in which a substance retains its identity is a_____________ change.
b) matter is added or removed during a ________ change.
c) energy required for completion of a physical change is _________ when the change is received.
d) dissolution of lead nitrate in water is deemed as a__________ change.
e) a change in which matter undergoes a change but the total mass of substance is unaltered is a ______________ change.
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Answer:
1. chemical changes
2. physical changes
3. chemical changes
4. physical changes
5.chemical changes
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