Solution 1 (Physical and Chemical Changes)

Rusting is a process in which the iron products get a brownish substance on them in the presence of oxygen and water. This brownish substance, Iron oxide is called rust.

Chemical reaction is given below:

Iron (Fe) + Oxygen (O2) + Water (H2O) → rust(iron oxide Fe2O3)

If the moisture in air is high rusting becomes faster.

Next solution

Helping Topics

Physical and chemical changes

Effect of Magnesium hydroxide on litmus paper

Physical and Chemical changes of a burning candle

Physical and chemical changes of making paper 

Burning of wood and cutting it into small pieces are considered as two different types of changes

Rusting of iron objects is faster in coastal areas than in deserts

Identification of Physical and Chemical changes in different processes

NCERT solutions class 7


Leave a comment