Question

Oxygen is an essential gas required for the respiration of all living organisms.

(a) How does oxygen found present in water and soil?

(b) The gradual degradation of iron objects in the presence of the air is known as _____.

(c) Which constituents of air lead to damage of the iron objects?

Answer 1

(a) Oxygen is present in water in the dissolved form. In soil, animals like earthworms make holes for the exchange of gases with the atmosphere.

(b) The gradual degradation of iron objects in the presence of the air is known as rusting.

(c) The constituents of the air responsible for the process of rusting are oxygen and moisture (water).