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Standard reduction potentials (SRP) for ...

Standard reduction potentials (SRP) for different systems can be used to decide the spontaneity of a reaction e.g., `E_(2n^(2+)//Zn)^(@)=-0.76V`, hence for the reaction `Zn+2H^(+)rarrZn^(2+)+H_(2),DeltaG^(@)` is negative. It has been found experimentally that if (SRP of an oxidant-SRP of a reductant) is more than 1.7V, then their combination may lead to explosion (though it may be prevented by kinetic factors).
Now go through the following data and answer the questions.
Data:

Which of the following ionic combinations may lead to the formation of explosive substance?

A

Sodium ion and azide ion

B

Silver ion and perchlorate ion

C

Silver ion and azide ion

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
C
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The standard reduction potential E^(@) for the half reactions are as : E^(@) Znrightarrow Zn^2+),E^(@) = +0.76V Fe rightarrow Fe^(2+)+ 2e^(-), E^(@) = 0.41V , The emf for the cell reaction, Fe^(2+)+ZnrightarrowZn^(2+) + Fe is ,

The standard reduction potential E^(@) for the half reactions are as Zn=Zn^(2+)+2e^(-),E^(@)=+0.76V Fe=Fe^(2+)+2e^(-),E^(@)=+0.41V The EMF for cell reaction Fe^(2+)+ZntoZn^(2+)+Fe is

Knowledge Check

  • Standard reduction potentials (SRP) for different systems can be used to decide the spontaneity of a reaction e.g., E_(2n^(2+)//Zn)^(@)=-0.76V , hence for the reaction Zn+2H^(+)rarrZn^(2+)+H_(2),DeltaG^(@) is negative. It has been found experimentally that if (SRP of an oxidant-SRP of a reductant) is more than 1.7V, then their combination may lead to explosion (though it may be prevented by kinetic factors). Now go through the following data and answer the questions. Data: Which statement about standard reduction potentials in correct?

    A
    `E_(H^(+)//H_(2))^(@)=` zero at all temperature
    B
    `E_(D^(+)//D_(2))^(@)=` Zero at 298 K
    C
    A redox reaction is feasible if sum of SRP of oxidant and that of reductant is a negative quantity.
    D
    `K_(2)Cr_(2)O^(7)` (acid) is stronger oxidising agent than `KMnO_(4)` (acid).

  • Standard reduction potentials (SRP) for different systems can be used to decide the spontaneity of a reaction e.g., E_(2n^(2+)//Zn)^(@)=-0.76V , hence for the reaction Zn+2H^(+)rarrZn^(2+)+H_(2),DeltaG^(@) is negative. It has been found experimentally that if (SRP of an oxidant-SRP of a reductant) is more than 1.7V, then their combination may lead to explosion (though it may be prevented by kinetic factors). Now go through the following data and answer the questions. Data: Which of the following ion will be capable of causing catalytic decomposition of H_(2)O_(2) ?

    A
    `Fe^(3+)` increases
    B
    `Fe^(3+)` will be reduced to Fe(2+)
    C
    Both a and b
    D
    none of these

  • E_(Zn^(2+)//Zn)^(0)=-0.76V The EMF of the cell Zn//Zn_((1M))^(2+)"||"HCl(pH=2)|H_2(1 atm)"),Pt is

    A
    `0.878V`
    B
    `0.642V`
    C
    `-0.878V`
    D
    `0.701V`

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    Use the standard reduction potentials to find the standard cell potential E^(@) , for the reaction: Zn(s)+2Tl^(+)(aq)rarrZn^(2+)(aq)+2Tl(s)

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    Standard reduction electrode potential of Zn^(2+)//Zn is -0.76V . This means:

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