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During the conformation test of Cu^{2+}, red brown colour appears due to the presence of

Option: 1

Cu_2[Fe(CN)_6]


Option: 2

Cu_4[Fe(CN)_6]


Option: 3

Na_4[Fe(CN)_6]


Option: 4

Ca_2[Fe(CN)_6]


Answers (1)

best_answer

As we learnt,

Cu^{2+} ions are detected by [Fe(CN)_6]^{4-}.

Cu_2[Fe(CN)_6)]  has red brown color which confirms the presence of Cu^{2+}

Cu^{2+} + [Fe(CN)_6]^{4-}\rightarrow Cu_2[Fe(CN)_6)]

Hence, the correct answer is Option (1)

Posted by

Suraj Bhandari

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