Observe the following experimental set-ups carefully.

If no reaction occurs in beakers II, IV and V, then which of the following statements is correct?

Options

A. X is less reactive than U but more reactive than Z.
B. W and X are more reactive than V.
C. Z and W are less reactive than Y.
D. V is more reactive than W but less reactive than U.

Answer

D

Explanation

No reaction occurs in beakers II, IV and V. We can conclude
from beaker II : X > W, from beaker IV : U > V,
from beaker V : Z > Y
`:.` Overall reactivity order is : U > V, Z > Y, X > W
Reaction occurs in beakers I, Ill and VI.
We can conclude
from beaker I : Z > U, from beaker Ill : V > X,
from beaker VI : Y > W
Thus, order of reactivity is Z > U, V > X, Y > W
Hence, overall reactivity order is Z > U > V > X > Y > W.
X is less reactive than U and also less reactive than Z
Wand X are less reactive than V.
Z is more reactive than Wand W is less reactive than Y.