Q. (1)
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?
(2)
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(b) Can you change rust back into iron by some simple method?
(3)
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(c) Do you think formation of rust from iron is a chemical change?
(4)
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(d) Give two other examples of a similar type of change.