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Deduce from the following E^@ values of ...

Deduce from the following `E^@` values of half cells, what combination of two half cells would result in a cell with the largest potential?

A

I and IV

B

II and III

C

III and IV

D

I and II

Text Solution

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The correct Answer is:
D
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Redox reactions play a pivotal role I chemistry and bilogy . The values of standard redox potential (E^(@)) of two half - cell reaction decided which way the reaction is expected to proceed. A simple example is a Daniel cell in which zinc goes into solution and copper get deposited. Given below are a set of half 0 cell reactions ( acidic medium ) along with their E^(@) values ( with respect to normal hydrogen electrode ) Using this data : I_2 + 2e^(-) to 2I^(-) E^(@) = 0.54 , Cl_2 + 2e^(-) to 2Cl^(-) " "E=1.36V Mn^(3+) + e^(-) to Mn^(2+) E^(@) = 1.50 , Fe^(3+) + e^(-) to Fe^(2+) E = 0.77V O_2 +4H^(+) + 4e^(-) to 2H_2O" " E^(@) = 1.23 , Among the following , identify the correct statement :

Redox reactions play a pivotal role I chemistry and bilogy . The values of standard redox potential (E^(@)) of two half - cell reaction decided which way the reaction is expected to proceed. A simple example is a Daniel cell in which zinc goes into solution and copper get deposited. Given below are a set of half 0 cell reactions ( acidic medium ) along with their E^(@) values ( with respect to normal hydrogen electrode ) Using this data : I_2 + 2e^(-) to 2I^(-) E^(@) = 0.54 , Cl_2 + 2e^(-) to 2Cl^(-) " "E=1.36V Mn^(3+) + e^(-) to Mn^(2+) E^(@) = 1.50 , Fe^(3+) + e^(-) to Fe^(2+) E = 0.77V O_2 +4H^(+) + 4e^(-) to 2H_2O" " E^(@) = 1.23 , While Fe^(3+) is stable , Mn^(3+) is not stable in acid solution because :

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  13. When E(Ag^(+) | Ag)^@ = 0.80 volt and E(Zn^(2+)|Zn)^@ = 0.76 volt, wh...

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  14. Deduce from the following E^@ values of half cells, what combination o...

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  15. The half cell reaction for the corrosion are , 2H^(+) + (1)/(2) O2 + ...

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  16. A cell constructed by coupling a standard copper electrode and a stand...

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  19. The standard reduction potentials of Ag, Cu, Co and Zn are 0.799, 0.33...

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