S.No.LIST-IColourS.No.LIST-2compoundA)Prussian blueP)Fe(CN)5NOS4−B)VioletQ)Fe4Fe(CN)63C)Blood redR)[Fe(SCN)]2+D)White pptS)AgCl ABCD1SPRQ2RPQS3PQRS4QPRS

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S.No.	LIST-I Colour	S.No.	LIST-2 compound
A)	Prussian blue	P)	${[Fe (CN)_{5} NOS]}^{4 -}$
B)	Violet	Q)	${Fe}_{4} {[Fe (CN)_{6}]}_{3}$
C)	Blood red	R)	$[Fe (SCN)]^{2 +}$
D)	White ppt	S)	$AgCl$

	A	B	C	D
1	S	P	R	Q
2	R	P	Q	S
3	P	Q	R	S
4	Q	P	R	S

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answer is D.

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Detailed Solution

$\begin{array}{l} {Na}_{4} [Fe (CN)_{5} NOS] \to Violet \\ Fe (SCN)_{3} \to blood red \\ [Fe (SCN)]^{+ 2} \to blood red \\ {Fe}_{4} {[Fe (CN)_{6}]}_{3} \to Prussionblue \\ AgCl \to white PPt \end{array}$