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The emf of cell is 1.3 Volt. The positiv...

The emf of cell is 1.3 Volt. The positive electrode has potential of 0.5 volt. The potential of negative electrode is

A

0.8 V

B

`-0.8V`

C

`1.8 V`

D

`-1.8 V`

Text Solution

Verified by Experts

The correct Answer is:
B
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The standard EMF of the cell: Ni|Ni^(2+)||Cu^(2+)|Cu , is 0.59 volt. The standard electrode potential (reduction potential) of copper electrode is 0.34 volt. Calculate the standard electrode potential of nickel electrode.

The electrode potential of oxidation half cell

Knowledge Check

  • Standard electrode potential of an electrode is :

    A
    Intensive property
    B
    Extensive property
    C
    Isothermal property
    D
    Isobaric property

  • The e.m.f of a cell containing of standard hydrogen electrode and a zinc electrode is found to be 0.74 volt. The SHE is the positive electrode in the combination. Then the potential of the zinc electrode is

    A
    0.74 volt
    B
    `+1.74` volt
    C
    `-0.74 `volt
    D
    `+0.37 `volt

  • The electrode potential of oxidation half cell

    A
    is independent of concentration of the ions in the cell
    B
    decreases with decreased concentration of the ions in the cell
    C
    decreases with increased concentration of the ions in the cell
    D
    is independent of temperature

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    A current of two amperes is flowing through a cell of e.m.f. 5 volts and internal resistance 0.5 ohm from negative to positive electrode. If the potential of negative electrode is 10 V , the potential of positive electrode will be

    The emf of a cell containing sodium/copper electrode is 3.05 V, if the electrode potential of copper electrode is +0.34 V, the electrode potential of sodium is :

    The potential associated with each electrode is known as electrode potential. If the concentration of each species taking part in the electrode reaction is unity (if any appears in the electrode reaction, it is confined to 1 atmospheric pressure) and further the reaction is carried out at 298 K, then the potential of each electrode is said to the standard electrode potential. By convention, the standard electrode potential of hydrogen electrode is 0.0 volt. The electrode potential value for each electrode process is a measure of relative tendency of the active species in the process to remain in the oxidised/reduced form. A negative E^(@) means that the redox couple is a stronger reducing agent than the H^(+)//H_(2) couple. A positive E^(@) means that the redox couple is a weaker reducing agent than the H^(+)//H_(2) couple. The metal with greater positive value of standard reduction potential forms the oxide of greater thermal stability. Which of the following couples will have highest value of emf ?

    The potential associated with each electrode is known as electrode potential. If the concentration of each species taking part in the electrode reaction is unity (if any appears in the electrode reaction, it is confined to 1 atmospheric pressure) and further the reaction is carried out at 298 K, then the potential of each electrode is said to the standard electrode potential. By convention, the standard electrode potential of hydrogen electrode is 0.0 volt. The electrode potential value for each electrode process is a measure of relative tendency of the active species in the process to remain in the oxidised/reduced form. A negative E^(@) means that the redox couple is a stronger reducing agent than the H^(+)//H_(2) couple. A positive E^(@) means that the redox couple is a weaker reducing agent than the H^(+)//H_(2) couple. The metal with greater positive value of standard reduction potential forms the oxide of greater thermal stability. Which of the following oxides will be thermally most stable ?

    The potential associated with each electrode is known as electrode potential. If the concentration of each species taking part in the electrode reaction is unity (if any appears in the electrode reaction, it is confined to 1 atmospheric pressure) and further the reaction is carried out at 298 K, then the potential of each electrode is said to the standard electrode potential. By convention, the standard electrode potential of hydrogen electrode is 0.0 volt. The electrode potential value for each electrode process is a measure of relative tendency of the active species in the process to remain in the oxidised/reduced form. A negative E^(@) means that the redox couple is a stronger reducing agent than the H^(+)//H_(2) couple. A positive E^(@) means that the redox couple is a weaker reducing agent than the H^(+)//H_(2) couple. The metal with greater positive value of standard reduction potential forms the oxide of greater thermal stability. Which of the following metals will not displace hydrogen from water ?

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