Question

A water sample has a hardness of 250 mg/l of caco3, the above water sample is generally classified as

Answer 1

Water is not only essential for human beings, plants and animals for sustaining life but is also equally important for agricultural, industrial and other purposes. The important sources of water are surface water, underground water and rain water. The increasing population in urban areas results in concentrated discharge of large quantities of water into rivers, lakes and estuaries. This results in the purifying capacity of the receiving water being overtaxed, resulting in gross pollution, severe nuisance and far reaching economic and health consequences. The concern is shown not only by experts and agencies dealing with the problem of pollution but by the public at large. Water is one of the abundant available substances in nature. Water forms about 75% of the matter on earth's crust. It is an essential ingredient to both plant and animal life. Moreover it also enjoys a unique position in industries. The chief sources of water fall in two main groups, o Surface water o Underground water..