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Chemical Reactivity (Group 1)

Formation of ...

Question

Formation of Prussian blue coloured precipitate during detection of nitrogen in an organic compound indicate the presence of which of the following compound?

A

F e_{4} [F e (C N)_{6}]_{3}

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B

F e_{3} [F e (C N)_{6}]_{2}

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C

F e_{2} [F e (C N)_{6}]

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D

None of the above

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Solution

The correct option is A $F e_{4} [F e (C N)_{6}]_{3}$
$3 [F e (C N)_{6}]^{4 -} + 4 F e^{3 +} + x H_{2} O \to F e_{4} [F e (C N)_{6}]_{3} . x H_{2} O P r u s s i a n b l u e$
Hence, the correct answer is option (a).

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