give reason;
magnetization of iron is a physical change while rusting of iron is a chemical change

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Solution

Rusting of iron is oxidation of iron from Fe to Fe₂O₃and is an irreversible process. hence a chemical change.
Whereas, iron bar gets magnetised only when it is in vicinity of a magnet and is a reversible process, hence it is a physical change.

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So, rusting of iron is a chemical change or physical change???

Q. Match the columns:

	I		II
(a)	Physical change	(i)	Curdling of milk
(b)	Chemical change	(ii)	Demagnetisation of magnets
		(iii)	Digestion of food
		(iv)	Crystallisation of substance
		(v)	Rusting of iron

Rusting of iron is both chemical and physical change . Why?

Give reasons why-sepration of mixtures E.g. iron from a mixture of iron & sulphur is a physical change, but heating a mixture of iron & sulphur is considered a chemical change.

Q. Rusting of iron is a physical change.

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give reason;magnetization of iron is a physical change while rusting of iron is a chemical change

Rusting of iron is oxidation of iron from Fe to Fe2O3 and is an irreversible process. hence a chemical change.Whereas, iron bar gets magnetised only when it is in vicinity of a magnet and is a reversible process, hence it is a physical change.

give reason;
magnetization of iron is a physical change while rusting of iron is a chemical change

Rusting of iron is oxidation of iron from Fe to Fe₂O₃and is an irreversible process. hence a chemical change.
Whereas, iron bar gets magnetised only when it is in vicinity of a magnet and is a reversible process, hence it is a physical change.