Question

In a galvanic cell, the correct statement will be:

• A. Current flows from the anode to the cathode
• B. Anode is the positive terminal
• C. If $E_{cell}<0$, it is a spontaneous reaction
• D. Cathode is the positive terminal

Answer 1

The correct option is D Cathode is the positive terminal

Galvanic cell:
An electrochemical cell that derives electrical energy from a spontaneous redox reaction taking place within the cell

$\Rightarrow$ Spontaneous reaction thus $\Delta G\le 0$
we know that $\Delta G=-nEF$
$-nEF\le 0$
$E_{cell}\ge 0$

oxidation $\Rightarrow$ at Anode
At which electrons are generated.

Reduction $\Rightarrow$ at Cathode
At which electrons are consumed
$\Rightarrow$ Electrons flow from the anode to the cathode thus direction of current is from cathode to anode, making the cathode the positive terminal.