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Manipal MET2024Chemistryp Block Elements (Group 15, 16, 17 & 18)

F₂ is 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 react with SbF ₅ to form F ₂ . In this reaction stronger Lewis acid SbF ₅ displace the weaker one ( MnF ₄ ) from its salt. MnF ₄ being unstable, readily decompose to give MnF ₃ and fluorine. The complete reaction is as follows, K ₂ MnF ₆+2 SbF ₅ 2 KSbF ₆+ MnF ₄ (unstable) 2 MnF ₄ 2 MnF ₃+ F ₂ Overall reaction, 2 ~K ₂ MnF ₆+4 SbF ₅ 4 KSbF ₆+2 MnF ₃+ F ₂

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