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NEET levelSingle correct optionDifficulty 1 of 3bn001

What is the oxidation number of manganese in $KMnO X_{4}$ ?

A $+ 5$
B $+ 6$
C $+ 7$
D $+ 4$

Answer: C

K is

+ 1

and each O is

- 2

. For

KMnO X_{4}

:

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

, so

x = + 7

.

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More questions on Oxidation number determination including fractional and unusual cases