Question

In Cu-Zn cell
(1) Reduction occurs at the copper cathode
(2) Oxidation occurs at the copper cathode
(3) Reduction occurs at the anode
(4) Chemical energy is converted to light energy

Answer 1

Hint: The electrochemical cell defines the cell that produces electricity from the chemical reaction. A dryer is an electrochemical cell or we can say a battery used mostly in the portable electronic device and equipment of houses. The copper zinc cell is an electrochemical cell.

Complete Step by Step Solution:
Let’s understand copper-zinc cell in detail. This cell can be prepared from zinc and copper metal with sulphate solution of each. That means, a zinc electrode is dipped in the solution of zinc sulphate and a copper electrode is dipped in the solution of copper sulphate and these two solutions (copper sulphate and zinc sulphate) are connected with the help of a salt bridge. And the two electrodes are connected by wires.

The oxidation reaction happens at the anode of zinc. Zinc lost two electrons and form cations and the reaction is,
\[{\rm{Zn}} \to {\rm{Z}}{{\rm{n}}^{2 + }} + 2{e^ - }\]
The reduction reaction happens at the cathode of copper. The copper ions take up electrons to form copper metal and get deposited. The chemical reaction is,
\[{\rm{C}}{{\rm{u}}^{{\rm{2 + }}}} + 2{e^ - } \to {\rm{Cu}}\]
Therefore, in the Cu-Zn cell, the reduction happens at the electrode of copper.
Hence, option A is right.

Note: There are many useful applications of Cu-Zn cells. They are used in the production of electricity or storage of electricity. They are used in the field of electrical telegraphy and battery development.