If you leave a piece of iron in the open for a few days, it acquires a film of brownish
substance, called rust.
(a) Do you think rust is different from iron?
(b) Can you change rust back into iron by some simple method?
(c) Do you think formation of rust on iron is a chemical change?
(d) Give two other examples of a similar type of change
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nice question I will anwer this soon ok
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