Each of the three metals X, Y and Z were put in turn into aqueous solution of the other two. X + Salt of Y (or Z) ⟶ Y (or Z) + Salt of X. Which observation is probably incorrect?
A
Y + Salt of X ⟶ No action observed
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B
Y + Salt of Z ⟶ Z + Salt of Y
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C
Z + Salt of X ⟶ X + Salt of Z
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D
Z + Salt of Y ⟶ No action observed
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Solution
The correct option is B Z + Salt of X ⟶ X + Salt of Z According to given conditions, X has higher tendency to oxidise so it is above Z in electrochemical series and thus, Z cannot displace X from its salt.