In the reaction Cu²⁺(aq) + 4NH₃(aq) ⇌ [Cu(NH₃)₄]²⁺(aq), what is the colour of the complex ion [Cu(NH₃)₄]²⁺? - P BLOCK ELEMENTS Quiz | GKFix.in

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Question

In the reaction Cu²⁺(aq) + 4NH₃(aq) ⇌ [Cu(NH₃)₄]²⁺(aq), what is the colour of the complex ion [Cu(NH₃)₄]²⁺?

A. Pale blue
B. Colourless
C. Green
D. Deep blue