MCQ
Consider the complex $[Co(NH_3)_4 CO_3]ClO_4$ , in which coordination number, oxidation number and number of $d$-electrons on the metal are respectively.
- A$6, 3, 6$
- B$6, 2, 7$
- ✓$5, 3, 6$
- D$5, 3, 7$
✓
Answer
Correct option: C.
$5, 3, 6$
c
$MnO _{4}^{-}+ S _{2} O _{3}^{2-} \rightarrow MnO _{2}+ SO _{4}^{2-}$
$MnO _{4}^{-}+ S _{2} O _{3}^{2-} \rightarrow MnO _{2}+ SO _{4}^{2-}$
$\quad \quad \quad \quad \quad \quad \quad\quad (+4) \quad \quad \quad (A)$
Oxidation state of $'S'$ in $SO _{4}^{2-}$
$=+6$
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