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Question

Which among the following is not correctly matched with their colour?

A
CompoundColourNa4[Fe(CN)5NOS]purple
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B
CompoundColourFe4[Fe(CN)6]3.xH2OCrimson red
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C
CompoundColour[Fe(SCN)]2+Blood red
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D
CompoundColourAgClWhite
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Solution

The correct option is B CompoundColourFe4[Fe(CN)6]3.xH2OCrimson red
a.Na2Sfrom sodium extracted+Na2[Fe(CN)5NO]Na4[Fe(CN)5NOS]purple colouration
b.3Fe[(CN)6]44Fe3+Fe4[Fe(CN)6]3.xH2OPrussian blue
c.Fe+3+SCN[Fe(SCN)]2+Ferricthiocynate (Blood red colouration)
d.Na+ClNaClAgNO3−−−AgClwhite ppt+NaNO3

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