The method that cannot be used for removing permanent hardness of water is

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The method that cannot be used for removing permanent hardness of water is



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1) The metallurgical process in which a metal is obtained in a fused state is called

2) The nucleus of an atom consists of

3) The nucleus of a hydrogen atom consists of

4) The inert gases are ____ in water

5) The mineral containing both magnesium and calcium is

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