The process of removal of hardness of water, irrespective of whether it is temporary or permanent is termed as __________
(a) Cleansing action of water
(b) Hardness of water
(c) Softening of water
(d) Purity of water
The question was posed to me in a national level competition.
Query is from R, S- Configuration and Water Softening in section Structure and Stereostructure of Molecules of Engineering Chemistry I