Question

A student made the following observations in the laboratory:

(i) Clean copper metal did not react with 1 molar ${Pb}\left({NO}_3\right)_2$ solution.

(ii) Clean lead metal dissolved in a 1 molar ${AgNO}_3$ solution and crystals of Ag metal appeared.

(iii) Clean silver metal did not react with 1 molar ${Cu}\left({NO}_3\right)_2$ solution.

The order of decreasing reducing character of the three metals is

(a) ${Cu}, {Pb}, {Ag}$

(b) ${Cu}, {Ag}, {Pb}$

(c) ${Pb}, {Cu}, {Ag}$

(d) ${Pb}, {Ag}, {Cu}$

Answer 1

Correct Option : (C)

Explanation :

From observations (i), (ii) and (iii), reducing character of metals are ${Pb}>{Cu}, {Pb}>{Ag}$ and ${Cu}>{Ag}$. Hence, for the three metals it is ${Pb}>{Cu}>{Ag}$.