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(A) If standard reduction potential for ...

(A) If standard reduction potential for the reaction, `Ag^(+)+e^(-) rarr Ag` is 0.80 volt, then for the reaction, `2Ag^(+)+2e^(-) rarr 2Ag`, it will be 1.60 volt.
(R) If concentration of `Ag^(+)` ions is doubled, the electrode potential is also doubled.

A

If both (A) and (R) are correct, and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect

D

If (A) is incorrect, but (R) is correct.

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The correct Answer is:
D
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The questions consist of two atatements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses : If standard reduction potential for the reaction Ag^+ = 2e^- Ag is 0. 80 volt, then for the raction 2 Ag^+ = 2e^- = 2e^- 2Ag , it will be 1, 60 volt . If concentration of Ag^+ ions is doubled , the standard electrode potential is also doubled.

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In a cell reaction, Cu_((s))+ 2Ag_((aq))^(+) to Cu_((aq))^(2+) + 2Ag_((s)) E_"cell"^@ =+0.46 V . If the concentration of Cu^(2+) ions is doubled then E_"cell"^@ will be

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The standard electrode potential for the reactions, Ag^(+)(aq)+e^(-) rarr Ag(s) Sn^(2+)(aq)+2e^(-) rarr Sn(s) at 25^(@)C are 0.80 volt and -0.14 volt, respectively. The emf of the cell Sn|Sn^(2+)(1M)||Ag^(+)(1M)Ag is :

Consider the reaction, 2Ag^(+)+Cd rarr 2Ag+Cd^(2+) The standard electrode potentials for Ag^(+) rarr Ag and Cd^(2+) rarr Cd couples are 0.80 volt and -0.40 volt respectively. (i) What is the standard potential E^(@) for this reaction ? (ii) For the electrochemical cell, in which this reaction takes place which electrode is negative electrode ?

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