Question

a metal nitrate solution a is added to reddish brown metal B. the metal present in A is used for making jewellry and turns black in air , very thin foils of metal are used to decorate sweets . the compond C formed on chemical reaction is blue in color and metal present in A is formed . identify A , B , C and write chemical reactions involved.

Answer 1

A is silver nitrate
B is copper
C is copper nitrate
AgNO3 + Cu = Cu(NO3) 2 + Ag
Displacement reaction