The reddish-brown covering of flaky substance on iron objects is called rust. When an iron object is left in moist air for a considerable time, rust is formed.
Question
What is rust? How is it formed?
- Physical and chemical changes CBSE Class 7
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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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