Which of the following is a redox reaction?

Given

(i) Cu²⁺ + 2e^– → Cu, E° = 0.337 V

(ii) Cu²⁺ + e^– → Cu⁺, E° = 0.153 V

Electrode potential E° for the reaction Cu⁺ + e^– → Cu will be

One faraday of electricity is passed separately through one litre of one molar aqueous solution of (i) AgNO₃, (ii) SnCl₄ and (iii) CuSO₄. The number of moles of Ag, Sn and Cu deposited at cathode are respectively

Standard free energies of formation (in kJ/mol) at 298 K are –237.2, –394.4 and –8.2 for H₂O(l), CO₂(g) and pentane(g), respectively. The value of Eo
cell for the pentane–oxygen fuel cell is

The standard reduction potentials of Zn²⁺ | Zn, Cu²⁺ | Cu and Ag⁺ | Ag are respectively –0.76, 0.34 and 0.8V. The following cells were constructed.

a) Zn | Zn²⁺ || Cu²⁺ | Cu

b) Zn | Zn²⁺ || Ag⁺ | Ag

c) Cu | Cu²⁺ || Ag⁺ | Ag

What is the correct order Eo
cell of these cells?

The standard electrode potential is measured by ______.

Corrosion of iron is essentially an electrochemical phenomenon where the cell reaction are ______.

A button cell used in watches functions as follows:

Zn(s) + Ag₂O(s) + H₂O(l) → 2Ag(s) + Zn²⁺(aq) + 2OH^– (aq)

If half cell potentials are

Zn²⁺ (aq) + 2e^– → Zn(s); E° = –0.76 V

Ag₂O(s) + H₂O(l) + 2e^– → 2Ag(s)+ 2OH^–(aq), E° = 0.34 V

The cell potential will be

Aluminium displaces hydrogen from dilute HCl whereas silver does not. The E.M.F. of a cell prepared by combining Al/Al⁺³ and Ag/Ag⁺ is 2.46 V. The reduction potential of silver electrode is + 0.80 V. The reduction potential of aluminium electrode is:

The reduction potential values of X, Y and Z are –3.05 V, –0.44 V and –0.83 V respectively. Which of the following order is correct with respect to their reducing property?