A complex of iron and cyanide ions is 100% ionised at 1m (molal). If its elevation in b.p. is 2.08. Then the complex is (Kb=0.52o mol−1 kg):

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K3[Fe(CN)6]

Fe(CN)2

K4[Fe(CN)6]

Fe(CN)4

answer is A.

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Detailed Solution

ΔTb=ikbmso, i=2.080.52×1=4So the complex is K3[Fe(CN)6]K3[Fe(CN)6]⇌3K++[Fe(CN)6]3−

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