Question

A gas X at 1atm is bubbled through a solution containing a mixture of $1M{Y}^{-}$ and $1M{Z}^{-}$ at ${25}^{0}C$.

If the order in the electrochemical series is:
$Z>Y>X$ then:

• A. Y will oxidize X and not Z
• B. Y will oxidize Z and not X
• C. Y will oxidize both X and Z
• D. Y will reduce both X and Z

Answer 1

Answer: (A)

Y will oxidize X and not Z

In redox reaction substances with:

(i) higher $E^o$ values will oxidize those with

lower $E^o$ values

(ii) lower $E^o$ values will reduce those with

higher $E^o$ values.

On the basis:

Y has higher $E^o$ value than X; Y will oxidize X

Y has lower $E^o$ value than Z; Y will not oxidize Z

Y has lower $E^o$ value than Z ; Y will reduce Z

Y has higher $E^o$ value than X; Y will not reduce X

Option A is correct.