Q.

The qualitative analysis to the salt solution addition of reagents NH4Cl+NH4OH and ammonium carbonate give precipitate in precipitate the oxidation state of anion (only magnitude)

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answer is 2.

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Detailed Solution

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V group cations ppted as carbonates BaCO3,CaCO3,SrCO3. Oxidation State of anion  = -2, magnitude value = 2

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