Chemistry - Complete s-block Question with Solution | TestHub
Larger alkali metal cations stabilise the large superoxide anion. Consider these reactions; the first gives acidic peroxide (A), base (B) and gas (C):
(unbalanced).
In a separate acidified sample, (A) oxidises iodide to molecular product (D):
.
Let be the number of unpaired electrons in one molecule of gas (C), the maximum number of atoms of one isolated molecule of (A) that lie in one plane, and the same maximum for (D). Find .
Answer:
Solution:
The balanced first reaction is
.
Thus (A) is , (B) is and (C) is .
In the separate acidified sample:
.
Hence (D) is molecular iodine, .
An oxygen molecule has two unpaired electrons, so .
Isolated hydrogen peroxide is non-planar, so at most three of its atoms lie in one plane: .
The diatomic iodine molecule has both atoms in a plane: .
Therefore .
