JEE Main Chemistry question

Chemistry Electrochemistry JEE Main

Each of three metals X, Y and Z was put in turn into aqueous solutions of the other two: it was found that in each case. Which observation below is probably incorrect?

(A) no action observed
(B) nothing can be decided
(C)Correct
(D) no action observed

Answer: (C)

Solution

Since X is established as more reactive than both Y and Z, Y and Z (being less reactive than X) cannot displace X from its salt — so (a) and (d) (both predicting "no action") are reasonable, correct observations. The relative reactivity of Y versus Z is not established by the given information, so (b)

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Question ID VK-143862