MCQ
The outer most shell electronic configuration of transition element is
- A$ns^2\,nd^{1-10}$
- ✓$(n-1)\,d^{1-10}\,ns^{1-2}$
- C$(n-1)\,d^2\,ns^{0-2}$
- D$(n-1)\,d^{1-10}\,ns^2$
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$I.$ All the chlorides are bonded by primary valency
$II.$ All the chlorides are bonded by secondary valency
$III.$ All the $NH_3$ are bonded by secondary valency
$IV.$ Half of the chlorides are bonded with secondary valency

Product $(A)$ of the above reaction is
