Consider the below given observations for W2- X2- Y2 and Z2- 2X-Y2- 2Y-X2 2W-Y2- no reaction 2Z-X2- 2X-Z2 Which of the following sequences is true-

The correct option is A E^0_W^ /W_2 gt; E^0_Y^ /Y_2 gt; E^0_X^ /X_2 gt; E^0_Z^ /Z_2 The element having lower electrode potential can reduce elements ...

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Byju's Answer

Standard XII

Chemistry

Nernst Equation

Consider the ...

Question

Consider the below given observations for $W_{2}, X_{2}, Y_{2}$ and $Z_{2}$ .
$2 X^{-} + Y_{2} \to 2 Y^{-} + X_{2}$
$2 W^{-} + Y_{2} \to$ no reaction
$2 Z^{-} + X_{2} \to 2 X^{-} + Z_{2}$
Which of the following sequences is true?

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 A $E_{W^{-} / W_{2}}^{0} > E_{Y^{-} / Y_{2}}^{0} > E_{X^{-} / X_{2}}^{0} > E_{Z^{-} / Z_{2}}^{0}$
The element having lower electrode potential can reduce elements having higher electrode potential.
In this sequence, $X^{-}$ reduces $Y$ (hence, $E_{Y^{-} / Y_{2}}^{0} > E_{X^{-} / X_{2}}^{0}$ ) , $Z^{-}$ reduces $X$ (hence, $E_{X^{-} / X_{2}}^{0} > E_{Z^{-} / Z_{2}}^{0}$ ), but $W^{-}$ cannot reduce $Y$ (as $E_{W^{-} / W_{2}}^{0} > E_{Y^{-} / Y_{2}}^{0}$ ).

Hence, the sequence of electrode potential in option A is correct.

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Consider the below given observations for W2,X2,Y2 and Z2.2X−+Y2→2Y−+X22W−+Y2→ no reaction2Z−+X2→2X−+Z2 Which of the following sequences is true?

Consider the below given observations for $W_{2}, X_{2}, Y_{2}$ and $Z_{2}$ .
$2 X^{-} + Y_{2} \to 2 Y^{-} + X_{2}$
$2 W^{-} + Y_{2} \to$ no reaction
$2 Z^{-} + X_{2} \to 2 X^{-} + Z_{2}$
Which of the following sequences is true?