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LIST-1 LIST-2
colour Product
A) prussian blue 1) $[Fe (CN)_{5} {NOS}^{4 -}$
B)Violet 2) ${Fe}_{4} {[Fe (CN)_{6}]}_{3}$
C) Blood red 3) $[Fe (SCN)]^{2 +}$
D) colourless 4)AgCl
5) ${Na}_{4} [Fe (CN)_{6}]$

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4 1 3 2

1 2 3 4

2 1 3 4

3 1 2 4

answer is D.

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Detailed Solution

${Na}_{2} S + {Na}_{2} [Fe (NO) (CN)_{5}] \to {Na}_{4} [Fe (NOS) (CN)_{5}] violet$

$\begin{matrix} Na + C + N + S \to NaSCN \\ {Fe}^{3 +} + 2 Na \to [Fe (SCN)] {(blood red)}^{2 +} \end{matrix}$

$AgCl (colorless)$

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