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) + Salt of X. Which observation is probably incorrect?
(a) Y + Salt of X = No action observed
(b) Y + Salt of Z = Z + Salt of Y
(c) Z + Salt of X = X + Salt of Z
(d) Z + Salt of Y = No action observed
(c) Given fact is: X is above Z and Y in electrochemical series X displaces Y & Z from their salts and thus, Z cannot displace X from its salt.