What sorts of informations can you draw from the following reaction ?

$$(CN)_{ 2 \; (g) } \; + \; 2 \; OH^{ – }_{ (aq) } \; \rightarrow \; CN_{ (aq) }^{ – } \; + \; CNO_{ (aq) }^{ – } \; + \; H_{ 2 }O_{ (l) }$$

Asked by Pragya Singh | 1 year ago |  68

##### Solution :-

The oxidation no. of C in $$(CN)_{ 2 }​, CN^{ – }$$

and $$CNO^{ – }$$ are +3, +2 and +4 respectively.

Let the oxidation no. of C be y.

$$(CN)_{ 2 }$$

2(y – 3) = 0

Therefore, y = 3

$$CN^{ – }$$

y – 3 = -1

Therefore, y = 2

$$CNO^{ – }$$

y – 3 -2 = -1

Therefore, y = 4

The oxidation no. of C in the reaction is:

Oxidation no. of C in $$(CN)_{ 2 }$$​ is +3

Oxidation no. of C in $$CN^{ – }$$ is +2

Oxidation no. of C in $$CNO^{ – }$$ is +4

We can see that the same compound is oxidized and reduced simultaneously in the reaction.

The reactions in which the same compound is oxidized and reduced is known as disproportionation reaction. Then, we can say that alkaline decomposition of cyanogens is a disproportionation reaction.

Answered by Abhisek | 1 year ago

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