A metallic oxide $A$ is strongly acidic and forms violet vapors on warming and explodes violently at 230K giving out oxygen and a weak acidic oxide. The compound $A$ on dissolution in water gives characteristic purple color, then compound $A$ is:

at its highest oxidation.

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having amphoteric nature.

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capable of giving some disproportionation reaction.

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White coloured.

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Solution

The correct option is B at its highest oxidation.
${M n}_{2} O_{7} Δ ⟶ {2 M n O}_{2} + 3 / 2 O_{2}$
(A)
Strongly weak
acidic acidic oxide
oxide
${M n}_{2} O_{7} + H_{2} O ⟶ {H M O}_{4}$
(purple solution)
${M n}_{2} O_{7} \to$ highest oxidation state, Dark green.

In MnO $_{7}$ , the oxidation state of Mn is +7.

Hence, the correct option is $A$

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A metallic oxide A is strongly acidic and forms violet vapors on warming and explodes violently at 230K giving out oxygen and a weak acidic oxide. The compound A on dissolution in water gives characteristic purple color, then compound A is:

The correct option is B at its highest oxidation.Mn2O7Δ⟶2MnO2+3/2O2 (A)Strongly weakacidic acidic oxideoxideMn2O7+H2O⟶HMO4 (purple solution)Mn2O7→ highest oxidation state, Dark green.In MnO7, the oxidation state of Mn is +7.Hence, the correct option is A

A metallic oxide $A$ is strongly acidic and forms violet vapors on warming and explodes violently at 230K giving out oxygen and a weak acidic oxide. The compound $A$ on dissolution in water gives characteristic purple color, then compound $A$ is: