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AIIMS2005Chemistryp Block Elements (Group 15, 16, 17 & 18)

F ₂ formed by reacting K ₂ MnF ₆ with

Options

  1. ASbF ₅
  2. BMnF ₃
  3. CKSbF ₆
  4. DMnF ₄ .

Correct answer

A. SbF ₅

Step-by-step solution

K ₂ MnF ₆+2 SbF ₅ 2 KSbF ₆+ MnF ₃+ 1 2 ~F ₂ In this reaction, the stronger Lewis acid SbF ₅ displaces the weaker one, MnF ₄ from its salt. MnF ₄ is unstable and readily decomposes to give MnF ₃ and fluorine.

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