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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3bn079

Select all compounds, identified by name or formula, in which the central metal has oxidation number $+ 6$ (in $CrO X_{5}$ take one oxo O and two $O X_{2} X^{2 -}$ groups).

Apotassium chromate
Bpotassium manganate
Cpotassium permanganate
D $CrO X_{5}$

Answer: A, B, D

K X_{2} CrO X_{4}

:

2 + x - 8 = 0

, Cr

+ 6

.

K X_{2} MnO X_{4}

: Mn

+ 6

.

KMnO X_{4}

: Mn

+ 7

.

CrO X_{5}

:

x - 2 - 4 = 0

, Cr

+ 6

.

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