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The prussian blue colour obtained in Lassaigne test is due to

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The prussian blue colour obtained in Lassaigne test is due to 

(a) Na4 [Fe(CN)6] 

(b) Fe4 [Fe(CN)6] 

(c) CuSO4 

(d) FeSO4

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1 Answer

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Best answer

(b) Fe4 [Fe(CN)6]

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