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Question

Standard reduction potentials of the half reactions are given below:

F2(g)+2e2F(aq); Eo=+2.85V
Cl2(g)+2e2Cl(aq); Eo=+1.36V
Br2(l)+2e2Br(aq); Eo=+1.06V
I2(g)+e2I(aq); Eo=+0.53V
The strongest oxidising and reducing agents respectively are:

A
Br2 and Cl
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B
Cl2 and Br
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C
Cl2 and I2
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D
F2 and I
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Solution

The correct option is D F2 and I
Fluorine is the strongest reducing agent as it has the highest value of standard reduction potential.
Iodide ion is the strongest reducing agent as it has the lowest value of the standard reduction potential.
As the value of the standard reduction potential decreases, the oxidizing power decreases and the reducing power increases.

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