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The E(M^(3+)|M^(2+))^(0) values for Cr, ...

The `E_(M^(3+)|M^(2+))^(0)` values for Cr, Mn, Fe and Co are -0.41, +1.57V, + 0.77 and +1.97V respectively. For which one of these metals the change in oxidation sate from +2 to +3 is easiest?

A

Cr

B

Co

C

Fe

D

Mn

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The correct Answer is:
A
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AAKASH SERIES-ELECTROCHEMISTRY -PRACTICE EXERCISE
  1. If phi denotes reduction potential, then which is true ?

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  2. E^(@) Values of the half cells Mg^(2+)//Mg and Cl(2)//Cl^(-) are resp...

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  3. The E(M^(3+)|M^(2+))^(0) values for Cr, Mn, Fe and Co are -0.41, +1.57...

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  4. How much will the reduction potential of Zn//Zn^(2+) change if the sol...

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  5. E(1//2Cl(2)|Cl^(-))^(@)= + 1.36V. The single electrode potential of P...

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  6. The e.m.f of the cell, Ni//Ni^(2+)(1M)////Cl^(-)(1M)//Cl(2),Pt is ...

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  7. The standard reduction potential for Fe^(2+)|Fe and Sn^(2+)|Sn elect...

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  8. The emf of the involving the reaction 2Ag((aq))^(+)+H(2(g)) rarr Ag((s...

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  9. Cr(2)O(7)^(2-) + I^(-) rarr I(2)+Cr^(3+) E(cell)^(@)=0.79V,E(Cr(2)O(7)...

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  10. The potential of hydrogen electrode at pH=10 and 25^(@)C is

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  11. For the cell reaction, Mg((s))+Cu((aq))^(2+) rarr Cu((s)) +g^(2+)(aq...

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  12. The emf of galvanic cell of the reaction Zn+Cu^(2+)rarr Zn^(2+) + Cu i...

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  13. E(cell)^(@) is 1.89V for the reaction 2Ce^(4+) +Co rarr 2Ce^(3+)+Co...

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  14. What is the potential of half-cell consisting of zinc electrode in 0.0...

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  15. Al^(3+)(aq)+3e^(-) rarr Al(s)E^(@)=-1.66V Cu^(2+)(aq)+2e^(-) rarr Cu...

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  16. If the solution of copper sulphate in which a copper rod is immersed,...

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  17. E.m.f. of the cell Zn|Zn^(2+)(1)||Cu^(2+)(1M)|Cu is 1.1 volt. If the s...

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  18. What is the electrode potential (in V) of the following electrode at ...

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  19. The oxidation potential of 0.05 MH(2)SO(4) is

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  20. Molar conductances of BaCl(2), H(2)SO(4) and HCl at infinite dilution ...

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