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Some Basic Concepts of Organic Chemistry question

2023 · Q99
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Some Basic Concepts of Organic Chemistry question

2023 · Q99

NEETChemistrySome Basic Concepts of Organic ChemistryMCQ+4 / −1

In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe3+\mathrm{Fe}^{3+}Fe3+ due to the formation of-

  1. A
    NaSCN
  2. B
    [Fe(CN)5NOS]4−\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NOS}\right]^{4-}[Fe(CN)5​NOS]4−
  3. C
    [Fe(SCN)]2+[\mathrm{Fe}(\mathrm{SCN})]^{2+}[Fe(SCN)]2+
  4. D
    Fe4[Fe(CN6)]3⋅xH2O\mathrm{Fe}_{4}\left[\mathrm{Fe}\left(\mathrm{CN}_{6}\right)\right]_{3} \cdot \mathrm{xH}_{2} \mathrm{O}Fe4​[Fe(CN6​)]3​⋅xH2​O
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