A solution added to gives A

CHEMISTRY · Single correct · CBSE · Chemistry · d- and f-Block Elements · d- and f-Block Elements

Problem

A FeCl3\mathrm{FeCl_3} solution added to K4[Fe(CN)6]\mathrm{K_4[Fe(CN)_6]} gives A, while with KSCN\mathrm{KSCN} gives B. A and B, respectively, are: (1) Fe3[Fe(CN)6]2, Fe(CNS)3\mathrm{Fe_3[Fe(CN)_6]_2},\ \mathrm{Fe(CNS)_3} (2) Fe4[Fe(CN)6]3, KFe(CNS)3\mathrm{Fe_4[Fe(CN)_6]_3},\ \mathrm{KFe(CNS)_3} (3) Fe4[Fe(CN)6]3, K3[Fe(CNS)6]\mathrm{Fe_4[Fe(CN)_6]_3},\ \mathrm{K_3[Fe(CNS)_6]} (4) Fe4[Fe(CN)6]3, K3[Fe(SCN)6]\mathrm{Fe_4[Fe(CN)_6]_3},\ \mathrm{K_3[Fe(SCN)_6]}

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