White coloured insoluble calcium carbonate is formed.
Question
Explain why Lime water turns milky on passing carbon dioxide gas into it.
- 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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