Melting of ice.
Question
Melting of wax is a change where a solid changes to liquid state. Give one more such change which you observe in your surroundings.
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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 methods? c. Do you think formation of rust from iron is a chemical change? d. Give two other examples of a similar type of change.
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