D-And F-Block Elements Ques 146

Question: $ F_2 $ is the formed by reacting $ K_2MnF_6 $ with

[AIIMS 2005]

Options:

A) $ SbF_5 $

B) $ MnF_3 $

C) $ KSbF_6 $

D) $ MnF_4 $

Show Answer

Answer:

Correct Answer: A

Solution:

$ K_2MnF_6~+2SbF_5\to 2KSbF_6+MnF_3+\frac{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.



NCERT Chapter Video Solution

Dual Pane