For a spontaneous process,what are the values of $\Delta G$,equilibrium constant $(K)$,and $E^o_{cell}$?

Which of the following is $NOT$ true about a voltaic cell?

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?

When a $Cu$ rod is kept in an $AgNO_3$ solution,what is the redox reaction that occurs?

What are reactive electrodes and inert electrodes? Give examples.

Draw the diagram of a galvanic cell and indicate the direction of flow of electrons and current for the cell constructed using $Al|Al^{3+}$ and $Ag^{+}|Ag$ half-cells,given $E^o_{Al^{3+}|Al} = -1.66 \ V$ and $E^o_{Ag^{+}|Ag} = 0.80 \ V$.