Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with FeSO4 in presence of concentrated H2SO4 indicates the presence of element/s

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Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with ${FeSO}_{4}$ in presence of concentrated $H_{2} {SO}_{4}$ indicates the presence of element/s

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Detailed Solution

$F e^{2 +} \overset{H^{+}}{\to} F e^{3 +} \overset{S C N^{-}}{\to} {[F e (S C N)]}^{2 +}$

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