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Which of the following statements is cor...

Which of the following statements is correct ?
If ` E_(Cu^(2+)|Cu)^(@) = 0.34 V and E_(Sn^(2+)|Sn)^(@) = -0.136 V , E_(H^(+)|H_2)^(@) = -0.0V `

A

`Cu^(+2)` ions can be reduced by `H_2(g)`

B

Cu can be oxidized by `H^(+)`

C

`Sn^(2+)` ions can be reduced by `H_2`

D

Sn can be oxidized by `Cu^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
A, D
`Sn^(+2) // Sn`
`2H^(oplus) //H_2 , Pt `
`Cu^(+2)// Cu`
`Cu^(+2) + 2e^(-) to Cu`
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The emf of the following cell Mg | Mg^(+2) (0.01 M) || Sn^(+2) (0.1 M) | Sn at 298 K in 'V' is (Given , E_(Mg^(+2)|Mg)^(@) = -2.34 V, E_(Sn^(+2)|Sn)^(@) = - 0.14 V )

If K_(c) for the reaction Cu_((aq))^(2+) + Sn_((aq))^(2+) to Sn_((aq))^(4+) + Cu_((s)) at 25^(@) C is represented as y xx 10^(6) then find the value of y . (Given : E(Cu^(2+) |Cu)^(@) = 0.34 V , E_(Sn^(4+)|Sn^(2+))^(@) = 0.15V )

E_(Cu^(2+)|Cu)^@ = +0.337 V, E_(Zn^(2+)| Zn)^@ = - 0.762 V. The EMF of the cell , Zn|Zn^(2+) (0.01M)||Cu^(2+) (0.01M)|Cu is

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AAKASH SERIES-ELECTROCHEMISTRY -LEVEL-II (LECTURE SHEET ( EXERCISE -I ( SINGLE & ONE OR MORE THAN ONE CORRECT ANSWER )))
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  2. In a lead storage battery

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  3. Which one is correct among the following give, the half cell emf's E^...

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  4. For the cell (at 298 K ) Ag((g)) // AgCl((s)) // Cl((aq))^(-) ||AgNO(3...

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  5. The value of the reaction quotient ,Q for the cell Zn(s) |Zn^(2+) (0.0...

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  6. DeltaG = DeltaH-TdeltaS and DeltaG = DeltaH + T[(d(DeltaG))/(dT)] " ...

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  7. For the cell Zn|Zn^(2+) (C1)||Zn^(2+) (C2)|Zn. DeltaG is negative if :

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  8. The Nernst equation , E = E^(0) -(RT)/(nF) . In Q indicates that the ...

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  9. The half cell reaction for the corrosion are , 2H^(+) + (1)/(2) O2 + ...

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  10. The E^(@) at 25^(@)C for the following reaction at the indicated conc...

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  11. A fuel cell develops an electrical potential from the combustion of b...

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  12. For a cell reaction 2H(2(g)) + O(2(g)) to 2H2O((l)) DeltaS(298)^(@) ...

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  13. Copper reduces NO3^(-) into NO and NO2 depending upon concentration of...

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  14. Consider the following standard reduction potentials Fe^(3+)(aq) + e...

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  15. Which of the following statements is / are correct ?

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  16. Which of the following facts regarding the movement of anions in the s...

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  17. Which of the following statements is correct ? If E(Cu^(2+)|Cu)^(@)...

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  18. The oxidation potential of hydrogen half-cell will be negative if :

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  19. Coulomb is the quantity of charge defined as :

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  20. E^(@) for two reactions are given below : Cr^(+3) + 3e^(-) to Cr , E^(...

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