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E^(c-) of Mg^(2+)|Mg,Zn^(2+)|Zn, and Fe^...

`E^(c-)` of `Mg^(2+)|Mg,Zn^(2+)|Zn`, and `Fe^(2+)|Fe` are `-2.37V,-0.76V`, and `-0.44V`, respectively. Which of the following is correct ?

A

Mg oxidises Fe

B

Zn oxidises Fe

C

Zn reduces `Mg^(2+)`

D

Zn reduces `Fe^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
D
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MOTION-ELECTROCHEMISTRY-EXERCISE -1
  1. The standard oxidation potential E^(@) for the half cell reactions ar...

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  2. The reduction electrode potential E of 0.1 M solutoin of M^(+) "ions"...

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  3. E^(c-) of Mg^(2+)|Mg,Zn^(2+)|Zn, and Fe^(2+)|Fe are -2.37V,-0.76V, and...

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  4. For the reactions MnO4^+8H^++5e^(-) rarrMn^(2+)+4H2O,E^0=1.51V MnO2^+...

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  5. Consider the following equations for a cell reaction A+BiffC+D, E^...

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  6. Given, standard electrode potentials Fe^(2+) +2e^(-) rarr Fe, E^(@)=...

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  7. At equilibrium :

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  8. Ni|Ni^(2+)(1.0M)||Au^(3+)(1.0M)| Au (where E^(@) for Ni^(2+)//Niis -0...

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  9. Normal aluminimum electrode cupled with normal hydrogen electrode give...

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  10. The cell reaction Zn+Cu^(2+)rarrZn^(2+)+Cu, is best represented by-

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  11. Consider a voltaic cell based on these half - cell reactions Ag^(+)(...

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  12. The value of reaction quotient Q for the cell Zn(s)|Zn^(2+)(0.01M)||...

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  13. Zn acts as sacrifical or cathodic protect iont to prevent rusting of i...

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  14. In electrochemical corrosion of metals, the metal undergoing corrosion...

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  15. When a lead storage battery is charged it acts as:

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  16. one gm metal M^(+2)was discharged by the passage of 1.81xx10^22 electr...

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  17. One mole of electron passes through each of the solution of AgNO3, CuS...

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  18. Salts of A (atomic weight 7), B (atomic weight 27) and C (atomic weigh...

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  19. The density of Cu is 8.94 g cm^(-3). The quantity of electricity neede...

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  20. During electrolysis of an aqeous solution of sodium sulphate if 2.4 Lo...

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