JEE Advanced 2024 Paper 2 Q04 Chemistry Inorganic Chemistry p-Block Elements (Groups 15-18) Medium

JEE Advanced 2024 Paper 2 · Q04 · p-Block Elements (Groups 15-18)

The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are

  1. A. $[PF_4]^+[PF_6]^-$ and $[PCl_4]^+[PF_6]^-$
  2. B. $[PCl_4]^+[PCl_4F_2]^-$ and $[PCl_4]^+[PF_6]^-$
  3. C. $PF_3$ and $PCl_3$
  4. D. $PF_5$ and $PCl_3$
Reveal answer + step-by-step solution

Correct answer:B

Solution

On fluorination of $PCl_5$ in a polar organic solvent, ionic isomers form. The colourless crystal is $[PCl_4]^+[PCl_4F_2]^-$ and the white crystal is $[PCl_4]^+[PF_6]^-$. Hence (B) is correct.

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