Question

1. In the refining of silver, the recovery of silver from silver nitrate solution involved displacement of copper metal. write down the reaction involved?
2. A shiny brown coloured element (x) on being heated in air becomes black in color. name the element (x) and the black coloured compound formed?

Answer 1

1. Cu+2AgNO3 ->Cu(NO3)2+2Ag
2. X element is Magnetic iron oxide and black coloured substance is ferric oxide