Home
Class 12
CHEMISTRY
The reaction is spontaneous if the cell ...

The reaction is spontaneous if the cell potenital is .

A

Negative

B

positive

C

Zero

D

Infinite

Text Solution

Verified by Experts

The correct Answer is:
B
EMF=[SRP of cathode -SRP of anode]
Where SRP =Standard reduction potential
If `EMF` is positive the reaction is spontaneous
For example in Falvanic cell
(a) Cathode is made of copper
(b) `EMF=1.1` volt
(c) Anode is made of Zinc
EMF ` =0.34 - (-0. 76 ) = 1.1` vollt.
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    A2Z|Exercise Section B - Assertion Reasoning|22 Videos

  • ELECTROCHEMISTRY

    A2Z|Exercise AIPMT/NEET Questions|35 Videos

  • ELECTROCHEMISTRY

    A2Z|Exercise Fuel Cell And Batteries|10 Videos

  • COORDINATION COMPOUNDS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF METALS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

A reactions is spontaneous if

Cell reactiomn is spontaneous when

The cell reaction as written is spontaneous if the cell potential is:

A cell reaction would be spontaneous if the cell potential and /_\_rG are respectively:

A reaction is non-spontaneous when:

A2Z-ELECTROCHEMISTRY-Construction And Working Of A Cell, Electrochemical Series And Its Applications
  1. The correct order of cahemical reactiveit with qater according to elec...

    Text Solution

    |

  2. The standard reduction potential for Fe^(2+) //Fe and Sn^(2+) //Sn ele...

    Text Solution

    |

  3. The reaction is spontaneous if the cell potenital is .

    Text Solution

    |

  4. The oxdation potentiasl of following half-cell reactions are given Zn ...

    Text Solution

    |

  5. Standard electrode potential of cell H2 ||H^+ || Ag^+ | Ag is ,.

    Text Solution

    |

  6. Consider the following E^o values : E(Fe^(3+)//Fe^(2+)) = + 0.77 V ...

    Text Solution

    |

  7. For the feasibility of a redox reaction in a cell, the emf should be.

    Text Solution

    |

  8. The standared reduction potntial E^o for the half-reactions are as. ...

    Text Solution

    |

  9. The gasX at 1 atm is bubbled through a solution containing a mixture o...

    Text Solution

    |

  10. The EMF of the cell Ni |Ni|Ni^(2+) ||Cu^(2+) |Cu(s) is 0.59 volt. The...

    Text Solution

    |

  11. The standard EMF of a Daniell cell is 1.10 volt. The maximum electric...

    Text Solution

    |

  12. The standard potentials at 298 K for the following halfreactions are a...

    Text Solution

    |

  13. The standard oxidation potentials of Ze and Ag in water at 25^@C are ...

    Text Solution

    |

  14. Given that E^o values of Ag^+//Ag, K^+//K, Mg^(2+)//Mg and Cr^(3+) //C...

    Text Solution

    |

  15. Which of the following is not a function of salt bridge ?

    Text Solution

    |

  16. The following facts are availabel : 2A^(c-)+B(2) rarr 2B^(-)+A(2), ...

    Text Solution

    |

  17. MnO4^(-) + 8H^(=) + 5e^(-) rarr Mn^(2+) + 4 H2 O If H^(+) concentra...

    Text Solution

    |

  18. Saturatd solution of KNO3 is used to mke salt bridge because .

    Text Solution

    |

  19. The electrode potential becomes equal to standard electrode potential ...

    Text Solution

    |

  20. Delta G^@ of the cell reaction AgCl (s) = 1/2 H2 (g) =Ag(s) H^+ + Cl...

    Text Solution

    |