Multiple choice

Which of the following complexes is correctly named?

  1. K3[Fe(CN)6] : Tripotassium hexacyanoferrate(III)

  2. K4[Fe(CN)6] : Potassium hexacyanoferrate(IV)

  3. [Cu(NH3)4](NO32 : Tetraamminecuprate(II) nitrate

  4. [Cr(NCS)4(NH3)2]- : Diamminetetrathiocyanatochromate(III) ion

  5. [Co(C2O4)(en)2]+ : Diethylenediammineoxalatocobalt(III) ion
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D Correct answer
Explanation

It is correctly named. [Cr(NCS)4(NH3)2]- : Diamminetetrathiocyanatochromate(III) ion 

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