Verified Solution • 2025–26 Session moderate

QJEEM21Ch08cc: JEE Main 2021 Chemistry - Class 11 JEEM21Ch08cc Solution: Which one of the following complexes is violet in colour?

Which one of the following complexes is violet in colour?

Multiple Choice Options

  • A [Fe(CN)6]4 −-
  • B [Fe(SCN)6]4 −-
  • C Fe4[Fe(CN6)]3 . H2O
  • D [Fe(CN)5NOS]4 −-

Step-by-Step Verified Solution

(a) [Fe(CN)6]4 −- →\to Pale yellow solution

(b) [Fe(SCN)6]4 −- →\to Blood red colour

(c) Fe4[Fe(CN6)]3 . H2O →\to Prussian blue

(d) [Fe(CN)5NOS]4 −- →\to Violet colour

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