MCQ
Which one of the following hydrides is least stable
- A$As{H_3}$
- ✓$Sb{H_3}$
- C$N{H_3}$
- D$P{H_3}$
✓
Answer
Correct option: B.
$Sb{H_3}$
b
(b) $\xrightarrow{{N{H_3}\,\, > \,\,\,P{H_3}\,\,\, > As{H_3}\,\, > \,\,Sb{H_3}\, > \,\,\,Bi{H_3}_{}}}$
(b) $\xrightarrow{{N{H_3}\,\, > \,\,\,P{H_3}\,\,\, > As{H_3}\,\, > \,\,Sb{H_3}\, > \,\,\,Bi{H_3}_{}}}$
Stability decreases down the group because bond energy decreases down the group.
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