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The compound that gets oxidised even on exposure to atmosphere is:
A. `Co_(2)(SO_(4))_(3)`
B. `NiSO_(4)`
C. `KMnO_(4)`
D. `FeSO_(4)`

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Correct Answer - D
`4FeSO_(4)+2H_(2)O+O_(2) to 4Fe(OH). SO_(4)("basic ferric sulphate")`

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