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Cyanogen gas is obtained in the reaction...

Cyanogen gas is obtained in the reaction

A

`CuSO_(4(aq))+KCN rarr`

B

`K_(4)[Fe(CN)_(6)]overset("heat")rarr`

C

`CH_(3)CN+H_(2)O overset(Delta)rarr`

D

`CH_(3)CONH_(2)+P_(2)O_(5) overset(Delta)rarr`

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The correct Answer is:
A
`2CuSO_(4)+4KCN to (CN)_(2)+2CuCN+2K_(2)SO_(4)` On combining solution of copper (II) salts and cyanides, an ustable copper (III) cyanide is formed which rapidly dccomposes into copper (I) cyanide and cyanogen.
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AIIMS PREVIOUS YEAR PAPERS-AIIMS 2007-CHEMISTRY
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  3. Cyanogen gas is obtained in the reaction

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  8. 1 mol each of the following compounds is dissolved in 1 L of solution....

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  9. CH(3)OC(2)H(5) and (CH(3))(3)COCH(3) are treated with hydroiodic acid....

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  11. Which of the following will give N(2) gas no treatment with nitrous ac...

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  14. During estimation of nickel , we prepare nickel dimethylglyoxime, a sc...

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  15. Critical temperatures for A, B, C and D gases are 25^(@)C, 10^(@)C, -8...

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  16. Which of the following metal ions will form complexes with the same ma...

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  17. During titration of acetic acid with aq. NaOH solution, the neutralisa...

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