Which of the following ion is present in compound A?

Ferrous

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Ferric

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Mercurous

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Mercuric

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Solution

The correct option is A Ferrous
A light green crystalline salt $F e S O_{4} . (N H_{4})_{2} S O_{4} .6 H_{2} O$ used chiefly in iron plating, in photography, and in chemical analysis; ferrous ammonium sulfate.
Thus, ferrous ions are present.

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