Question
Water has some air dissolved in it. What is its significance?
Solution
Air dissolved in water has the following advantages:
(i) Oxygen present in water is very useful for giving life to fish and other sea animals in the water.
(ii) Carbondioxide dissolved in water is very useful for carrying out photosynthesis in plants.
(iii) Carbon dioxide dissolved in water reacts with calcium carbonate present in marble rocks to produce calcium bicarbonate which is soluble.
Marine organisms fulfil their requirement of calcium carbonate from calcium bicarbonate.
