Question

On the basis of the sequence of the given reactions identify the most and least reactive elements:
X+ YA → XA + Y ...(i)
X + YB → XB + Y ...(ii)
Z + XA → ZA + X
A. X and Z
B. Y and Z
C. Z and X
D. Z and Y

Answer 1

Answer:

Option d is correct

Explanation:

Answer 2

Answer:

d) Z and Y

Explanation:

From the sets of reactions i, ii, iii, it can be observed from i and ii that X is more reactive than Y and hence it displaces Y from its salt.  From reaction iii it can be observed that Z is more reactive than X as it displaces X from its salt.  So the most reactive element is Z and the least reactive is Y.