The oxidation states of central metal ions of $(A), (B)$ and $(C)$ compounds are respectively:

+II, +VI and + VII

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+II, + VI and + VI

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+II, + VII and + VII

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+VI, + VII and +VII

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Solution

The correct option is A +II, +VI and + VII
$(A)$ is $M n (N O_{3})_{2}$
$M n (N O_{3})_{2} + (K_{2} C O_{3} + K N O_{3}) ⟶ K_{2} M n O_{4}      G r e e n c o l o u r (B)$
$K_{2} M n O_{4}      (B)^{+} K M n O_{4}      P i n k s o l u t i o n (C)$
$M n (N O_{3})_{2}      (A) + 4 N a O H + B r_{2} ⟶ 2 N a B r + M n O_{2}      (D) + 2 N a N O_{3} + 2 H_{2} O$
$M n O_{2} + P b O_{2} + H N O_{3} ⟶ H M n O_{4}      P i n k (E) + P b (N O_{3})_{2} + 2 H_{2} O$
$M n (N O_{3})_{2} + B a C l_{2} ⟶ B a (N O_{3})_{2} + M n C L_{2}      (F)$
Oxidation state of $A : M n (N O_{3})_{2} ⟶ + 2$
Oxidation state of $B : K_{2} M n O_{4} ⟶ + 6$
Oxidation state of $C : K M n O_{4} ⟶ + 7$

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The oxidation states of central metal ions of (A), (B) and (C) compounds are respectively:

The oxidation states of central metal ions of $(A), (B)$ and $(C)$ compounds are respectively: