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In the Daniel cell which change increase...

In the Daniel cell which change increases the cell EMF

A

Increase in the concentration of `ZnSO_(4)`

B

Increase in the dilution of `ZnSO_(4)`

C

Decreasing the concentration of `CuSO_(4)`

D

Increasing the dilution of `CuSO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
Cell EMF can be increased by decreasing the concentration of cathode electrode dipped electrolyte.
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Daniell Cell

In a Daniel cell,

Assertion A :Increase in the concentration of copper half cell in Daniel cell increases the emf of the cell. Reason R: According to Nernst equation. E_(cell)=E_(cell)^(0)+(0.059)/(2)log.([Cu^(++)])/([Zn^(++)])

The emf of the cells obtained by combining zinc and copper electrodes of the Daniell cell with calomel electrodes are 1.083 volt and -0.018 volt respectively at 25^(@)C . If the reduction potential of normal calomel electrode is + 0.28 volt, find the emf of the Daniell cell.

Which of the following changes will increase the EMF of the cell : Co(s)|CoCl_(2)(M_(2))||HCl(M_(2))||(H_(2),g)Pt

NARAYNA- ELECTRO CHEMISTRY-LEVEL-II(C.W)
  1. For the Daniel Cell involving the cell reaction Zn((s))+Cu((aq))^(+2)...

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  2. The position of some metals in the electrochemical series in dectreasi...

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  3. In the Daniel cell which change increases the cell EMF

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  4. The chemical reaction 2AgCl("(fused)")+H(2(g))rarr2HCl((aq))+2Ag((s)...

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  5. The following are some statements about normal hydrogen electrode a)...

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  6. The solution of CuSO(4) in which copper rod is immersed is diluted to ...

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  7. The standard reduction potential of Zn^(2+)|Zn and Cu^(2+)|Cu are -0.7...

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  8. E(Zn^(2+)//Zn)^(0)=-0.76V The EMF of the cell Zn//Zn((1M))^(2+)"||"HCl...

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  9. The emf of a Daniell cell at 298 K is E(1) Zn|ZnSO(4)(0.01 M)||CuSO(...

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  10. Given that E(H(2)O|H(2)|Pt) =0 at 298K. The pressure of H(2) gas would...

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  11. Which graph correctly correlates E(cell) as a function of concentratio...

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  12. In the electrochemical cell H(2)(g),"1 atm"|H^(+)(1M)"||"Cu^(2+)(1M)...

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  13. The potential of the cell containing two hydrogen electrodes as repres...

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  14. The emf of the cell, Zn|Zn^(2+)(0.01M)|| Fe^(2+)(0.001M) | Fe at 2...

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  15. For the cell reaction Cu^(2+)(C(1),aq.)+Zn(s)hArrZn^(2+)(C(2),aq)+Cu...

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  16. Which of the following reactions occurs at the anode during the rechar...

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  17. As lead storage battery is charged

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  18. Alkali storage cell is commonly called

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  19. Galvanized iron sheets are coated with

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  20. Which of the following metals acts as a sacrificial anode for iron art...

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