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A metal 'X' forms a salt XSO(4). The sal...

A metal 'X' forms a salt `XSO_(4)`. The salt forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wires and alloys like brass.

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(a) Copper.
(b) Copper hydroxide `[Cu(OH)_(2)]`.
(c) `CuSO_(4)+2NaOH to Cu(OH)_(2)+NaSO_(4),` Double - displacement reaction.
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