Home
Class 12
CHEMISTRY
The standard reduction potentials at 25^...

The standard reduction potentials at `25^(@)C` for the following half reactions are given against each:
`Zn^(2+) (a.q) + 2e^(-) hArr Zn (s) : " " - 0.762`
`Cr^(3+) (a.q) 3e^(-) hArr Cr (s) , " " - 0.740`
`2H^(+) + 2e^(-) hArr H_(2) (g), " " 0.00`
`Fe^(3+) + e^(-) hArr Fe^(2+) , " " 0.77`
Which is the strongest reducing agent?

A

Zn(s)

B

Cr(s)

C

`H_(2)(g)`

D

`Fe^(2+)(aq)`

Text Solution

Verified by Experts

The correct Answer is:
A
More negative is the reduction potential, higher will be the reducing property, i.e., the power to give up electrons.
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    ERRORLESS |Exercise Jee Section (More than one choice correct answer)|10 Videos

  • ELECTROCHEMISTRY

    ERRORLESS |Exercise Jee Section (Reasoning type question)|3 Videos

  • ELECTROCHEMISTRY

    ERRORLESS |Exercise Critical Thinking Objective Question|16 Videos

  • D & P-BLOCK ELEMENTS

    ERRORLESS |Exercise JEE Section (Numeric answer type questions)|2 Videos

  • ENVIRONMENTAL CHEMISTRY

    ERRORLESS |Exercise CRITICAL THINKING (Objective question )|16 Videos

Similar Questions

Explore conceptually related problems

At 298 K, the standard reduction potentials for the following half reactions are given. Which acts as anode with others in electrochemical cell Zn^(+2)(aq) + 2e^(-) to Zn(s), -0.762 Cr^(+3)(aq) + 3e^(-) to Cr(s), -0.740 2H^(+)(aq) + 2e^(-) to H_2(g), -0.000 Fe^(+3)(aq) + e^(-) to Fe^(2+)(aq) , +0.762

The standard reduction potentials at 298K for the following half cells are given : ZN^(2+)(aq)+ 2e^(-)Zn(s) , E^(@) = - 0.762V Cr^(3+)(aq)+ 3e^(-) Cr(s) , E^(@) = - 0.740V 2H^(+) (aq)+2e^(-) H_(2)(g) , E^(@)= 0.000V Fe^(3+)(aq)+ e^(-) Fe^(2+)(aq) , E^(@) = 0.770V which is the strongest reducing agent ?

The standard reduction potentials at 298K, for the following half cells are given: Zn^(2+)(aq)+2e^(-)hArrZn(s):E^(@)=-0.762V Cr^(3+)(aq)+3e^(-)hArrCr(s):E^(@)=-0.740V 2H^(+)(aq)+2e^(-)hArrH_(2)(g), E^(@)=0.000V Fe^(3+)(aq)+e^(-)hArrFe^(2+)(aq),E^(@)=0.770V Which is the stronget reducing agent?

The standard potentials at 298 K for the following halfreactions are as given Zn^(2+) + 2e underset(larr)(rarr) Zn E^o =- 0/ 762 V . 2 H^+ + 2 Erarr H_2 (g) E^o = 0.000 V Cr^(3+) + 3e underset(larr)(rarr) Cr E^o =- 0.740 V Fe^(3+) 2e rarr Fe^(2+) E^o =0.772 V Which of the following is the strongest reducing agent ?

The standard reduction potential at 298 K for the following half reactions are given below: Fe^(3+)(1M)+e^(-)rarrFe^(2+)(aq),E^(o)=0.770 V, Zn^(2+)(1M)+2e^(-)rarrZn(s),E^(o)=-0.762 V Cd^(2+)(1M)+2e^(-)rarrCd(s),E^(o)=-0.402 V, 2H^(+)(1M)+2e^(-)rarrH_(2)(g),E^(o) = 0.00 V. The strpongest reducing agent is:

ERRORLESS -ELECTROCHEMISTRY-Jee Section (Only one choice correct answer)
  1. The standard reduction potentials at 25^(@)C for the following half re...

    Text Solution

    |

  2. Which has ability to release bromine from KBr ?

    Text Solution

    |

  3. Faraday's laws of electrolysis are related to the

    Text Solution

    |

  4. In electrolysis of dilute H2SO4 using platinum electrodes .

    Text Solution

    |

  5. The electric charge for electrode deposition of one gram equivalent of...

    Text Solution

    |

  6. A solution containing 1 mol per litre of each Cu(NO(3))(2), AgNO(3), ...

    Text Solution

    |

  7. The reaction (1)/(2)H(2)(g)+AgCl(s)hArrH^(+)(aq)+Cl^(-)(aq)+Ag(s) ...

    Text Solution

    |

  8. When a lead storage battery is discharged

    Text Solution

    |

  9. The standard oxidation potential E^(@) for the half cell reactions ar...

    Text Solution

    |

  10. When a copper wire is placed I a solution of AgNO3, the solution acqu...

    Text Solution

    |

  11. Which one of the following metals can not be obtained on electrolysis ...

    Text Solution

    |

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

    Text Solution

    |

  13. Cu^(+) ion is not stable in aqueous solution because because of dispro...

    Text Solution

    |

  14. The requrierd charege for one equivalent weifht of silver deposited on...

    Text Solution

    |

  15. A dilute aqueous solution of Na(2)SO(4) is electrolyzed using platinum...

    Text Solution

    |

  16. The standard reduction potentials of Cu^(2+)|Cu and Cu^(2+)|Cu^(o+) ar...

    Text Solution

    |

  17. A standard hydrogen electrode has zero electrode potential because :

    Text Solution

    |

  18. The standard reduction potential values of three metallic cations, X,Y...

    Text Solution

    |

  19. The emf of the cell in which the following reactions, Zn(s)+Ni^(2+) ...

    Text Solution

    |

  20. A gas X at 1 atm is bubbled through a solution containing a mixture of...

    Text Solution

    |