Which statement is correct for a fuel cell?

What is the approximate standard free energy change per mole of $Zn$ (in $kJ \ mol^{-1}$) for a Daniell cell at $298 \ K$?

What is the change in oxidation number of $Pb$ at the positive electrode of a lead accumulator acting as a galvanic cell?

Fill in the blanks :
$(1)$ In a galvanic cell,the anode and cathode possess $\dots$ and $\dots$ charge respectively.
$(2)$ According to convention,the anode and cathode in a galvanic cell are present on the $\dots$ and $\dots$ side respectively.

$A$ cell reaction is spontaneous when

For the reduction of silver ions with copper metal,the standard cell potential was found to be $+ 0.46 \ V$ at $25^oC.$ The value of standard Gibb's energy,$\Delta G^o$ will be .......... $kJ.$
$(F = 96500 \ C \ mol^{-1})$