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Uses of Alkaline Earth Metals

Chocolate bro...

Question

Chocolate brown precipitate (A) is formed when aq. $C u S O_{4}$ reacts with $K_{4} [F e (C N)_{6}]$ . What is the formula of A from the following?

C u C N

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C u O

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C u_{2} O

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

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Solution

The correct option is D $C u_{2} [F e (C N)_{6}]$
$2 C u S O_{4} (a q) + K_{4} [F e (C N)_{6}] (a q) \to C u_{2} [F e (C N)_{6}] Chocolate brown (A) (s) + 2 K_{2} S O_{4}$

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

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

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

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