On the basis of the following E^ovalues, the strongest oxidising  agent is.

[Fe(CN)₆]^4- [Fe(CN)₆]^3- + e^-;

   Fe²⁺ Fe³⁺ + e^-'           E^o = - 0.77 V

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  E^o_cell for the pentane-oxygen fuel cell is.

In electrolysis of NaCI when Pt electrode is taken then H₂ is liberated at cathode while with Hg cathode it forms sodium amalgam because.

4.5 g of aluminium (at.mass 27 u) is deposited at cathode from AI³⁺ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H⁺ ions in solution by the same quantity of electric charge will be

Which one of the following pairs of substances on reaction will not evolve H₂ gas.

Standard reduction potentials at 25^oC of Li⁺/Li,Ba²⁺/Ba,Na⁺/Na and Mg²⁺/Mg are -3.05,-2.90,2.71 and -2.37 volt respectively. Which one of the following is the strongest oxidising agent ?

For the cell reaction,

Cu²⁺(C₁,aq) + Zn(s) Zn²⁺ (C₂,aq) + Cu(s)

of an electrochemical cell, the change in free energy at a given temperature is a function of.

Standard electrode potentials are

E^o for the cell, Zn [Zn²⁺ (aq)] [Cu²⁺(aq)] Cu is 1.10 V at 25^oC. The equilibrium constant for the reaction,

Zn(s) + Cu²⁺(aq) Cu(s) + Zn²⁺(aq) is of the order.

AI₂o₃ is reduced by electrolysis at low potentials and high currents. If 4.0 x 10⁴ A of current is passed through molten AI₂O₃for 6 h, what mass of aluminium is produced ? (Assume 100% current efficiency, at mass of AI = 27 g mol^-1)