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For the cell prepared from electrod A ,...

For the cell prepared from electrod A , `Cr_2O_7^(2-) |Cr^(3+) , E_("red")^(@) = + 1.33V ` and electrode `B: Fe^(3+) | Fe^(2+), E_("red")^(@) = 0.77V ` . Which of the following statement is correct ?

A

The electrons will flow from B to A when the connection is made

B

The e.m.f. of the cell will be 0.56V

C

A will be positive electrode

D

All of the above

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The correct Answer is:
D
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AAKASH SERIES-ELECTROCHEMISTRY -LEVEL-I ( EXERCISE-I)
  1. E^(@) for Fe^(2+) + 2e to Fe is -0.44 V , E^(@) for Zn^(2+) + 2e to ...

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  2. Based on the data given below , the correct order of reducing power i...

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  3. For the cell prepared from electrod A , Cr2O7^(2-) |Cr^(3+) , E("red"...

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  4. The S.R.Ps of Cu^(2+) // Cu , Hg^(2+)//Hg and Zn^(2+)//Zn are respecti...

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

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  6. (A): A blue colour is obtained when a copper wire is immersed in AgNO3...

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  7. The half cell reaction, with its standard reduction potentials are ...

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  8. A student made the following observations in the laboratory, A) Cl...

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  9. Four colourless salt solutions are placed in separate test tubes and a...

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  10. (A): In the construction of Galvanic cell, lithium electrode can not b...

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  11. The potential of single electrode depends upon

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  12. The Nernst equation giving dependence of electrode potential on concen...

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  13. Consider the following four electrode : A = Cu^(2+) (0.0001 M)// Cu(...

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  14. The Nernst equation for the reduction potential of a non metal A when ...

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  15. Which of the following is not correct ?

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  16. The e.m.f of the following Deniell at 298 K is E1 , Zn//ZnSO4 (0.01 M...

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  17. Zn(s) + Cl2 (1 atm ) to Zn^(2+) + 2Cl^(-) , the E^(0) of the cell is ...

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  18. For the cell Zn// Zn^(2+) // // Cu^(2+) // Cu , if the concentration o...

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  19. In a cell that utilises the reaction Zn((s)) + 2H((aq))^(+) to Zn((aq)...

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  20. For a cell reaction , Cu^(2+) (C1 , aq) + Zn(s) to Zn^(2+) (C2 , aq) +...

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