For the cell reaction,$Zn + Cu^{2+} \to Zn^{2+} + Cu,$ the cell representation is:

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:

In the electrochemical cell $H_{2(g)}, 1 \ atm | H^{+} (1 \ M) || Cu^{2+} (1 \ M) | Cu_{(s)}$,which one of the following statements is true?

Which of the following reactions is used to make a fuel cell?

Compound $A$ used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound $A$ is

What is a primary battery? Provide a note on primary batteries and a note on dry cells.