First slide

Electrochemical cells

Question

$E_{A^{+} / A}^{0} = 0.5 V; E_{B^{+} / B}^{0} = 0.2 V; E_{C^{+} / C}^{0} = - 0.3 V; E_{D^{+} / D}^{0} = - 0.1 V$
Based on above data select correct statements under standard condition

Moderate

A

Best oxidizing agent is $A^{+}$
B

Best reducing agent is D
C

C can displace $D^{+}$ from it’s solution
D

a Galvanic cell obtained by electrodes A and B shows the current flow from B to A in external circuit.

Solution

Element lower SRP reduces ion with higher SRP
The ion with higher SRP oxidises the element with lower SRP
Electrons flow from anode (B) to cathode (A) and hence current flows from A to B

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