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JEE Main levelSingle correct optionDifficulty 2 of 3bn025

What is the IUPAC name of $K X_{2} MnO X_{4}$ using Stock notation (Roman numeral for the oxidation state of the central atom)?

Apotassium manganate(VI)
Bpotassium manganite(IV)
Cpotassium permanganate(VI)
Dpotassium manganate(VII)

Answer: A

2 (+ 1) + x + 4 (- 2) = 0

gives

x = + 6

. The anion is manganate, so the name is potassium manganate(VI) (

KMnO X_{4}

is potassium manganate(VII)).

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