Explain how rusting of iron envisaged as setting of an electrochemical cell.

Draw the diagram a of galvanic cell involving following reactions:

$\mathrm{Zn}+{\mathrm{Cu}}^{2+}⟶{\mathrm{Zn}}^{2+}+\mathrm{Cu}$ and answer the following questions.

Label the cathode and anode

Draw the diagram a of galvanic cell involving following reactions:

$\mathrm{Zn}+{\mathrm{Cu}}^{2+}⟶{\mathrm{Zn}}^{2+}+\mathrm{Cu}$ and answer the following questions.

How does the e.m.f. of the cell change with the decrease in the concentration of ${\mathrm{Cu}}^{2+}$ ions ?

Draw the diagram a of galvanic cell involving following reactions:

$\mathrm{Zn}+{\mathrm{Cu}}^{2+}⟶{\mathrm{Zn}}^{2+}+\mathrm{Cu}$ and answer the following questions.

What is the function of salt bridge in it ?

Draw the diagram a of galvanic cell involving following reactions:

$\mathrm{Zn}+{\mathrm{Cu}}^{2+}⟶{\mathrm{Zn}}^{2+}+\mathrm{Cu}$ and answer the following questions.

Name the salt to be used in salt bridge.