Question

A redox reaction is shown in the diagrams. Identify the reaction.

• A. $Zn_{\left(s\right) }+ Cu^{2+}_{\left(aq\right)} \to Zn^{2^{ }+}_{\left(aq\right)} + Cu_{\left(s\right)}$
• B. $Cu_{\left(s\right) }+ 2Ag^{+}_{\left(aq\right)} \to Cu^{2^{ }+}_{\left(aq\right)} + 2Ag_{\left(s\right)}$
• C. $2Ag_{\left(s\right) }+ Cu^{2+}_{\left(aq\right)} \to 2Ag^{+}_{\left(aq\right)} + Cu_{\left(s\right)}$
• D. $Cu_{\left(s\right) }+ Zn^{2+}_{\left(aq\right)} \to Cu^{2+}_{\left(aq\right)} + Zn_{\left(s\right)}$

Answer 1

Answer: (A)

Zinc rod dipped in blue copper sulphate solution is oxidised to $Zn^{2+}$ and $Cu^{2+}$ are reduced to $Cu$ and get deposited on zinc rod.