Standard hydrogen electrode $(SHE)$ is a

Adding powdered lead and iron to a solution that is $1.0 \ M$ in both $Pb^{2+}$ and $Fe^{2+}$ ions would result in a reaction in which:

Which one of the following is the correct plot of $\Lambda_m$ (in $S \ cm^2 \ mol^{-1}$) and $\sqrt{C}$ (in $mol^{1/2} \ L^{-1/2}$) for a $KCl$ solution? ($y=\Lambda_m$; $x=\sqrt{C}$)

Give the symbolic representation of the following galvanic cells:
$(i)$ Daniell cell
$(ii)$ Copper-Silver cell

Assertion : For the Daniel cell,$Zn|Zn^{2+} || Cu^{2+}|Cu$ with $E_{cell} = 1.1 \ V$,the application of an opposite potential greater than $1.1 \ V$ results in the flow of electrons from cathode to anode.
Reason : $Zn$ is deposited at the anode,and $Cu$ is deposited at the cathode.

Saturated solution of $KNO_3$ is used to make a salt bridge because