Fill in the blanks :
$1$. Standard potential of Daniell cell is $\dots$ volt.
$2$. In Daniell cell,chemical energy is converted into $\dots$ energy.
$3$. In Daniell cell,$\dots$ is anode and $\dots$ is cathode.

What acts as a reducing agent when a dry cell is working?

$A$ hypothetical electrochemical cell is shown below $A | A^{+} (xM) || B^{+} (yM) | B$. If the cell potential is $+0.20 \ V$,the cell reaction is :-

Which among the following equations represents the reduction taking place in a lead accumulator at the positive electrode,while it is being used as a source of electrical energy?

Observe the following statements about a dry cell:
$I$. It is a primary battery.
$II$. Zinc vessel acts as cathode.
$III$. $A$ paste of moist $NH_4Cl$,$MnO_2$ and $ZnCl_2$ is present between two electrodes.
$IV$. The potential of this cell is $1.5 \ V$.
The correct statements are:

Give advantages of fuel cell.