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Cyanogen gas is obtained in the reaction...

Cyanogen gas is obtained in the reaction

A

`CuSO_4_(aq)+KCNto`

B

`K_4[Fe(CN)_6]overset(heat)to`

C

`CH_3CN+H_2Ooverset(triangle)to`

D

`CH_3CONH_2+P_2O_5overset(triangle)to`

Text Solution

Verified by Experts

The correct Answer is:
A
`2CuSO_4+4KCNto(CN)_2CuCN_2K_2SO_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 cyanogens.
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