а 12. 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?
Answers
Explanation:
Yes. When iron reacts with water and atmospheric oxygen iron oxide is formed which is called rust. This is a chemical change as a new compound is formed.
Answer:
oxygen iron oxide
rust is chemically different from iron
no we cannot change rust back into iron
chemical change
Explanation:
(c) Yes. When iron reacts with water and atmospheric oxygen iron oxide is formed which is called rust. This is a chemical change as a new compound is formed.
Yes, rust is chemically different from iron. Yes, it is a chemical change.
no we cannot change rust back into iron because its a chemical chnge and the properties of a chemical change are irreversible and gives a new object.
Rusting of iron is a chemical change because a new substance iron oxide is formed. The presence of oxygen and water or water vapour is essential for rusting.