SATHEE: Redox Reactions And Electrochemistry Ques 568

Redox Reactions And Electrochemistry Ques 568

Question: Consider the following reactions

(i) $C d^{2 +} (a q) + 2 e^{-} \overset{}{\to} C d (s), E^{\circ} = - 0.40 V$ (ii) $A g^{+} (a q) + e^{-} \overset{}{\to} A g (s), E^{\circ} = 0.80 V$ For the galvanic cell involving the above reactions. Which of the following is not correct-

Options:

A) Molar concentration of the cation in the cathodic compartment changes faster than that of the cation in the anodic compartment.

B) $E_{c e l l}$ increase when $C d^{2 +}$ solution is diluted.

C) Twice as many electrons pass through the cadmium electrode as through silver electrode.

D) $E_{c e l l}$ decreases when $A g^{+}$ solution is diluted.

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $C d (s) + 2 A g^{+} (a q) \overset{}{\to} C d^{2 +} (a q) + A g (s),$ $E_{c e l l} = E_{c e l l}^{^{\circ}} - \frac{0.059}{2} \log \frac{[C d^{2 +}]}{{[A g^{+}]}^{2}}$

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Redox Reactions And Electrochemistry Ques 568

Question: Consider the following reactions

Options:

Answer:

Solution:

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