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

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Appearance of red colour on treatment with Na\mathrm{Na} fusion extract of an organic compound with FeSO4\mathrm{FeSO}_4 in presence of conc. H2SO4\mathrm{H}_2 \mathrm{SO}_4 indicate element?
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Correct option: D
N & S\mathrm{N \,\& \,S}
Option D (N & S) is correct because the red color with FeSO4 and H2SO4 indicates the presence of both nitrogen and sulfur, forming [Fe(SCN)3].

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