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In the replacement reaction rarrC-I+M...

In the replacement reaction
`rarrC-I+MF rarr rarr C-F+MI`
The reaction will be most favourable if `M` happens to be

A

Na

B

K

C

Rb

D

Li

Text Solution

Verified by Experts

The correct Answer is:
C
For the reaction

The reaction will be fastest with Rb because a larger cation stabilises a larger anion through lattice energy effects. Ionic radius `Rb^(+)` (152 pm), `F^(-)` (133 pm) and `I^(-)` (220 pm).
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