Question

A reddish brown metal X is added to solution metal nitrate Y.The metal present Y is used for making jewellary and turns black in air.Very thin foils of metal are used to decorate sweets.The compound Z formed on chemical reaction is blue in colour and metal present in Y is formed.Identify X Y & Z and write chemical reactions involved.

Answer 1

The metal is copper (Cu).
The metal nitrate is Silver nitrate (AgNO3).
When silver nitrate reacts with copper, it becomes copper nitrate Cu(NO3)2 
Cu + 2AgNO3→→→→Cu(NO3)2 + 2Ag
Therefore X = Cu
Y = AgN03
Z = Cu(NO3)2

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Answer 2

Answer:

Above answer is correct