In the lassaigne’s test for detection of nitrogen, the Blue coloration is due to the formation of

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K4FeCN6

Fe4FeCN63

Fe3FeCN64

K3FeCN6

answer is B.

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Detailed Solution

Fe+2+6CN−→FeCN64− 4Fe+3+3FeCN64−→xH2OFe4FeCN63 Ferric Ferro cyanide (or) Iron III, Hexacyano ferrate (II)

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