The following facts are available.
$2 X^{-} + Y_{2} ⟶ 2 Y^{-} + X_{2}$
$2 W^{-} + Y_{2} ⟶$ No reaction
$2 Z^{-} + X_{2} ⟶ 2 X^{-} + Z_{2}$
Which of the following statements is correct?

E_{W^{-} / W_{2}}^{0} > E_{Y^{-} / Y_{2}}^{0} > E_{X^{-} / X_{2}}^{0} > E_{Z^{-} / Z_{2}}^{0}

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E_{W^{-} / W_{2}}^{0} < E_{Y^{-} / Y_{2}}^{0} < E_{X^{-} / X_{2}}^{0} < E_{Z^{-} / Z_{2}}^{0}

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E_{W^{-} / W_{2}}^{0} < E_{Y^{-} / Y_{2}}^{0} > E_{X^{-} / X_{2}}^{0} > E_{Z^{-} / Z_{2}}^{0}

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E_{W^{-} / W_{2}}^{0} > E_{Y^{-} / Y_{2}}^{0} < E_{X^{-} / X_{2}}^{0} < E_{Z^{-} / Z_{2}}^{0}

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Solution

The correct option is B $E_{W^{-} / W_{2}}^{0} < E_{Y^{-} / Y_{2}}^{0} < E_{X^{-} / X_{2}}^{0} < E_{Z^{-} / Z_{2}}^{0}$
From the first reaction, we conclude $E_{Y^{-} / Y_{2}}^{0} < E_{X^{-} / X_{2}}^{0}$
From the second reaction, we conclude $E_{W^{-} / W_{2}^{0}}^{0} < E_{Y^{-} / Y_{2}}^{0}$
From the third reaction, we conclude $E_{X^{-} / X_{2}}^{0} < E_{Z^{-} / Z_{2}}^{0}$
Hence, we have $E_{W^{-} / W_{2}}^{0} < E_{Y^{-} / Y_{2}}^{0} < E_{X^{-} / X_{2}}^{0} < E_{Z^{-} / Z_{2}}^{0}$
Hence, (b) is correct.

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