Question

What will you observe when:-
i)Some zinc particles are put in copper sulphate solution
ii)Some silver pieces are put into green ferrous

Answer 1

We have,

(1)Some zinc pieces are put in copper sulfate solution and (2)some pieces of silver are put into green coloured ferrous sulphate solution.

Observation no 1 :The solution will get colourless.Zinc will be replace with copper as zinc is more reactive than copper,and metallic copper will be accompanied in the bottom of the bekar.

Reaction : Zn + CuSo4 ---->ZnSo4 + Cu

Observation no 2 :The green solution will become pale white.Here also the same, silver will be replace with iron, and metallic iron will be found accompanied in the bottom.

Reaction : Ag + FeSo4 ----> AgSo4 + Fe

There type of reactions are called displacement or substitution reaction and the standard figure of them is,

A + BC ----> AC + B


Hope this helps :)