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NEET levelSingle correct optionDifficulty 1 of 3bn116

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

A $+ 7$
B $+ 6$
C $+ 4$
D $+ 2$

Answer: A

K is

+ 1

and each O is

- 2

:

1 + x + 4 (- 2) = 0

, so

x = + 7

.

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