alleryGoing down group 15, the minus three oxidation state becomes:
AMore common
BFully fixed
CVery stable
DLess common
Answer & Solution
Correct answer: D. Less common
1. The tendency to show this state weakens down the group.
2. Bismuth hardly forms any compound in it.
3. So it becomes less common going down.
_Source: syllabus Chemistry, Chapter 7, The p-Block Elements._
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