Q. Daniel cell, anode and cathode are respectively
A) $Zn\ |\ {Zn}^{2 +}\ and\ {Cu}^{2 +}\ |\ Cu$
B) $Cu\ |\ {Cu}^{2 +}\ and\ {Zn}^{2 +}\ |\ Zn$
C) $Fe\ |\ {Fe}^{2 +}\ and\ {Cu}^{2 +}\ |\ Cu$
D) $Cu\ |\ {Cu}^{2 +}\ and\ {Fe}^{2 +}\ |\ Fe$
Explanation
(a)
In Danial cell, oxidation occurs at anode and reduction occurs at cathode. Thus, the element, which has higher negative value of reduction potential, is used as anode and that with lower negative value of reduction potential is used as cathode.
∵ Reduction potential of Zn is more negative than Cu.
∴ $Zn\ |\ {Zn}^{2 +}\ is\ anode\ and\ {Cu}^{2 +}\ |\ Cu\ is\ cathode.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.