Question

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 the formation of rust from iron is a chemical change?
(d) Give two other examples of a similar type of change

Answer 1

Answer:

a yes

b yes

c yes

d idk hdjsb

Answer 2

Answer:

a. rust is the iron, but it has been exposed to O2 therefore it is oxidised iron.

b. no.

c. yes it is a chemical change and the iron reacts with oxygen forming Iron                    oxide (Fe2O3)

d. copper reacts with oxygen to form copper oxide or CuO

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