Name a ‘pure’ and an ‘impure’ form of water in its natural state.
State the method by which impurities present in natural water can be removed.
(a) Name the purest form of water occurring in nature.
(b) Is the above form of water 100% pure? If not, name the impurities which are generally present in it.
(c) Name two more impurities which dissolve in the above form of water in industrial regions. How do these impurities harm?
Which of the following is the most impure form of natural water?