In the Lassaigne’s test for nitrogen in ...

In the Lassaigne’s test for nitrogen in an organic compound, the Prussian blue colours is obtained due to the formation of :

`Na_4 [ Fe (CN)_6]`

`Fe_(4) [ Fe (CN)_6 ]_3`

`Fe_(2) [ Fe (CN)_6]`

`Fe_3 [ Fe (CN) _6 ]_4`

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The correct Answer is:

(b) Prussion blue colour is due to the formation of `Fe_(4) [ Fe ( CN)_6 ]_3`

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