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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
The $ IUPAC$  name of ${[Cr{(N{H_3})_6}]^{3 + }}$ is
  • A
    Hexamminechromium $ (VI)$  ion
  • ✓
    Hexamminechromium $(III)$  ion
  • C
    Hexamminechromium $ (II)$  ion
  • D
    Hexamminechloride
✓

Answer

Correct option: B.
Hexamminechromium $(III)$  ion
b
(b)In the given ion ${[Cr{(N{H_3})_6}]^{3 + }}$, the oxidation state of chromium is  $+3 $ and here $6N{H_3}$ ligand are attached to the central metal atom. Therefore its $ IUPAC$  name is hexamminechromium $(III)$  ion.

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