Question

In the following reaction mixtures,
1)$Cu/CuSo _{4}+ Ag / Ag _{2} SO _{4}$
2) $Zn / ZnSO _{4}+ Cu / CuSO _{4}$

• A. reduction and reduction
• B. oxidation and reduction
• C. reduction and oxidation
• D. oxidation and oxidation

Answer 1

Answer: (B)

So, the reactions can be written as,
(i) $\overset{0}{Cu} + \overset{+1}{Ag _{2}} SO _{4} \longrightarrow \overset{2+}{Cu}SO _{4}+\overset{0}{2 Ag}$
(ii) $\overset{0}{Zn} + \overset{+2}{CuSO _{4}} \rightarrow \overset{+2}{ZnSO _{4}}+ \overset{0}{Cu}$