JEE CHEMISTRY MCQ: ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES AND TECHNIQUES

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In Lassaigne’s test, a blue colour is obtained if the organic compound contains nitrogen. The blue colour is due to

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Correct option: B

\mathrm{F}{\mathrm{e}_4}{\left[ {\mathrm{Fe}{{\left( {\mathrm{CN}} \right)}_6}} \right]_3}

Option B (

\mathrm{F}{\mathrm{e}_4}{\left[ {\mathrm{Fe}{{\left( {\mathrm{CN}} \right)}_6}} \right]_3}

) is correct because the blue color in Lassaigne's test is due to the formation of ferric ferrocyanide, also known as Prussian blue.

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