Verified Solution • 2025–26 Session moderate

QJEEM22Ch213d: JEE Main 2022 Chemistry - Class 11 JEEM22Ch213d Solution: The formula of the purple colour formed in Laissaigne's test…

The formula of the purple colour formed in Laissaigne's test for sulphur using sodium nitroprusside is :

Multiple Choice Options

  • A NaFe[Fe(CN)6]
  • B Na[Cr(NH3)2(NCS)4]
  • C Na2[Fe(CN)5(NO)]
  • D Na4[Fe(CN)5(NOS)]

Step-by-Step Verified Solution

S2−+[Fe(CN)5NO)]2−→[Fe(CN)5(NOS)]4−\left.\mathrm{S}^{2-}+\left[\mathrm{Fe}(\mathrm{CN})_{5} \mathrm{NO}\right)\right]^{2-} \rightarrow\left[\mathrm{Fe}(\mathrm{CN})_{5}(\mathrm{NOS})\right]^{4-}

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