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Question

Which of the following statements is true for the following half cell reactions?

F2(g)+2e2F(aq);E0=2.87 VCl2(g)+2eCl(aq);E0=1.36 VFe3+(aq)+eFe2+(aq);E0=0.77 V

A
F2 is the strongest oxidising agent
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B
F gets oxidised to F2 by Cl2
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C
F gets oxidised to F2 by Fe3+
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D
All of the above
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Solution

The correct option is A F2 is the strongest oxidising agent
Standard reduction potentials (SRP) of the half cell electrodes are calculated and arranged in a series of increasing order which is known as electrochemical series.
The standard electrode potential of H+/H2 couple is zero.

Here, a negative E0 signifies that it has high tendency to get oxidised and the redox couple is a stronger reducing agent than the H+/H2 couple.

A positive E0 signifies that it has high tendency to get reduced and the redox couple is a stronger oxidising agent than the H+/H2 couple.

Going down the electrochemical series, the E0 value decrease i.e., the strength of oxidising agent gets reduced.

In the given half cell reactions,
F2/F couple has the highest E0 value.
Hence, it is the strongest oxidising agent.
It oxidise both Cl and Fe2+ to Cl2 and Fe3+ respectively.

Since, F2/F couple has the highest E0 value, it can't be oxidised by both Cl2/Cl and Fe3+/Fe2+ couples.

Hence, statement (a) is correct.

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