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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
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
$MnO _{4}^{-}+ S _{2} O _{3}^{2-} \rightarrow MnO _{2}+ SO _{4}^{2-}$

$\quad \quad \quad \quad \quad \quad \quad\quad (+4) \quad \quad \quad (A)$

Oxidation state of $'S'$ in $SO _{4}^{2-}$

$=+6$

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