Which solution is filled in a salt bridge?

Assertion: The cell potential of a mercury cell is $1.35 \ V$,which remains constant.
Reason: In a mercury cell,the electrolyte is a paste of $KOH$ and $ZnO$.

In which cell,construction like a galvanic cell can be observed? Explain.

For the electrochemical cell $M \mid M^{2+} \parallel X \mid X^{2-}$,if $E^{\circ}_{(M^{2+} / M)} = 0.46 \ V$ and $E^{\circ}_{(X / X^{2-})} = 0.34 \ V$,which of the following is correct?

During the charging of a lead storage battery,which of the following occurs?

The electrolyte used in a mercury cell is: