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JEE Main levelOne or more correct optionsDifficulty 2 of 3cc089

Select the correct IUPAC names.

  1. A : hexaaminecobalt(III) chloride
  2. B : potassium tetrachloridoplatinate(II)
  3. C : tetraamminecopper(II) sulfate
  4. D : tetracarbonylnickel(0)

Answer: B, C, D

Ni(CO)4 is neutral with neutral CO, so Ni(0). In K2[PtCl4] Pt is , +2, and it is an anion, so platinate(II). In the copper salt the cation is , so Cu(II), and the sulfate is the counter-ion. The cobalt name misspells ammine as amine, so it is wrong.
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