Answer:
Q1.rusting of iron is a chemical change..
it can be prevented by Coating, painting, galvinization, oiling etc
Q2. physical change: 1.its temporary change
2.physical changes do not involve the production of energy.
3.its reversible
4.no new substance is formed.
chemical change: 1.its permanent
2.it involve the production of energy
3.its irreversible
4.in this the new substance is formed
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Verified answer
Answer:
Q1.rusting of iron is a chemical change..
it can be prevented by Coating, painting, galvinization, oiling etc
Q2. physical change: 1.its temporary change
2.physical changes do not involve the production of energy.
3.its reversible
4.no new substance is formed.
chemical change: 1.its permanent
2.it involve the production of energy
3.its irreversible
4.in this the new substance is formed