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NEET2007Chemistryd and f Block ElementsActual

Cyanogen gas is obtained in the reaction

Options

  1. A( CuSO _ 4(a q) + KCN )
  2. B( K ₄ [ Fe ( CN )₆ ] heat )
  3. C( CH ₃ CN + H ₂ O )
  4. D( CH ₃ CONH ₂+ P ₂ O ₅ )

Correct answer

A. ( CuSO _ 4(a q) + KCN )

Step-by-step solution

(2 CuSO ₄+4 KCN ( CN )₂+2 CuCN +2 ~K ₂ SO ₄ ) On combining solution of copper (II) salts and cyanides, an unstable copper (III) cyanide is formed which rapidly decomposes into copper (I) cyanide and cyanogen.

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