The $\mathrm{Zn}$ acts as sacrificial or cathodic protection to prevent rusting of iron because :

The $\mathrm{Zn}$ acts as sacrificial or cathodic protection to prevent rusting of iron because :
  1. $\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Zn} < \mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Fe}$
  2. $\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Zn}>\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Fe}$
  3. $\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Zn}=\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Fe}$
  4. $\mathrm{Zn}$ is cheaper than iron

Solution

$\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Zn}>\mathrm{E}_{\mathrm{OP}}^{\circ}$ of $\mathrm{Fe}$ ~

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more ELECTROCHEMISTRY questions on Aicharya