From the following equations, what is the order of decreasing reactivity of X, Y and Z?

Y (s) + X²+(aq) → Y²+(aq) + X(s) X(s) + Z²+(aq) → X²+(aq) + Z(s)

A. X>Y>Z
B. Y > X > Z
C. Z > Y > X
D. Y > Z > X
E. X > Z > Y

Correct Answer:

Option B – Y > X > Z