MCQ
The oxidation number of $Co$ in the complex ion
- A$+2$
- ✓$+3$
- C$+4$
- D$+6$
✓
Answer
Correct option: B.
$+3$
b
EAN value of platinum: $=78-4+12=86$
EAN value of platinum: $=78-4+12=86$
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