What are the correct names for ${\text{KMn}}{{\text{O}}_{\text{4}}}$ and ${{\text{K}}_{\text{2}}}{\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{7}}}$, using oxidation numbers?

A.     Potassium permanganate and potassium dichromate

B.     Potassium manganate(IV) and potassium chromate(VII)

C.     Potassium permanganate(IV) and potassium dichromate(VII)

D.     Potassium manganate(VII) and potassium dichromate(VI)

D

Many justified comments were made on this question, as there was indeed an unfortunate mistake in the answer D of the question, where dichromate became chromate. This question was therefore not taken into account and will be corrected for publication.