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NEET levelSingle correct optionDifficulty 1 of 3df056

The maximum oxidation state shown by manganese in its compounds is

A $+ 7$
B $+ 8$
C $+ 6$
D $+ 5$

Answer: A

Manganese has the configuration

3 d^{5} 4 s^{2}

, so all seven valence electrons can be used. The highest state is

+ 7

, as in

KMnO X_{4}

and

Mn X_{2} O X_{7}

;

+ 8

is not reached because oxygen cannot stabilise it for Mn.

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