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NEET2006ChemistryCoordination CompoundsActual

Copper sulphate dissolves in excess of KCN to give:

Options

  1. ACu ( CN )₂
  2. BCuCN
  3. C[ Cu ( CN ) 4]³⁻
  4. D[ Cu ( CN )₄ ]²⁻

Correct answer

C. [ Cu ( CN ) 4]³⁻

Step-by-step solution

CuSO ₄+2 KCN Cu ( CN )₂+ K ₂ SO ₄ Cupric cyanide array r 2 Cu ( CN )₂ 2 Cu ( CN )+ NC - CN Cyanogen Cu ( CN )+3 KCN K ₃ [ Cu ( CN )₄ ] array Soluble complex salt

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