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(A) : The Daniel cell becomes dead after...

(A) : The Daniel cell becomes dead after some time
(R) : Oxidation potential of zinc anode increases and that of copper cathode decreases

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

(A) is false but (R) is true

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-ELECTROCHEMISTRY -LEVEL-I ( EXERCISE-I)
  1. Which of the following statements is true for the electrochemical Dani...

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  2. The cell reaction of the galvanic cell, Cu(s) // Cu^(2+)(aq) // Hg^(2+...

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  3. (A) : The Daniel cell becomes dead after some time (R) : Oxidation...

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  4. The cell for which the cell reaction is H2 + Cu^(2+) to 2H^(+) + Cu is...

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  5. Which metal will dissolve if the cell works Cu|Cu^(2+)||Ag^(+)|Ag

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  6. The chemical reaction 2AgCl((s)) + H(2(g)) to 2HCl((aq)) + 2Ag((s)) t...

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  7. Which is a correct cell reaction ?

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  8. Stronger the oxidising agent greater is the

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  9. The reaction , 1//2H(2(g)) + AgCl((s)) to H((aq))^(+) + Cl((aq))^(-) ...

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  10. For spontanity of a cell, which is correct ?

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  11. If the cell reaction is spontaneous

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  12. (A) : If E^(0) " of " Cu^(2+)//Cu=+0.34V and E^(0) " of "Ag^(+) // Ag ...

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  13. The metal that cannot displace hydrogen from dilute hydrochloric acid ...

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  14. A standard hydrogen electrode has zero electrode potential because

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  15. The following statements about electro chemical series are i) the ...

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  16. The following are some statements about normal hydrogen electrode ...

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  17. Which defines the standard reduction electrode potential of Zn^(2+) io...

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  18. (A) : Lithium has less electrode potential than caesium (R) : Hydr...

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  19. The reference electrode is made by using

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  20. The more electro positive element has

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