$K, Ca$ and $Li$ metals may be arranged in the decreasing order of their standard electrode potentials as

What is denoted by a negative $E^o$ and a positive $E^o$ value in electrochemistry?

If in a galvanic cell,the hydrogen half-cell is the cathode on the right side,what is the sign of the standard electrode potential of such a galvanic cell? Give an example.

Give the cell potential formula for the Daniell cell and the Copper-Silver cell.

Given
$E^o_{Cl_2/Cl^-} = 1.36 \ V,$
$E^o_{Cr^{3+}/Cr} = -0.74 \ V,$
$E^o_{Cr_2O_7^{2-}/Cr^{3+}} = 1.33 \ V,$
$E^o_{MnO_4^-/Mn^{2+}} = 1.51 \ V$
Among the following,the strongest reducing agent is:

If more than one species is available near the cathode,which species will undergo a reduction reaction? Provide suitable examples.