If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
- Do you think rust is different from iron?
- Can you change rust back into iron by some simple methods?
- Do you think formation of rust from iron is a chemical change?
- Give two other examples of a similar type of change.
- Yes, rust is chemically different from iron.
- Yes, it is a chemical change.
- Setting of curd from milk.
- Burning of magnesium ribbon to form magnesium oxide.