In the replacement reaction:R-Cl + MF rightar | vedclass

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(C) The given reaction is a Swarts reaction,which is used to prepare alkyl fluorides from alkyl chlorides or bromides.The reaction is driven by the pr

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$Rb$

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(C) The given reaction is a Swarts reaction,which is used to prepare alkyl fluorides from alkyl chlorides or bromides.The reaction is driven by the precipitation of the metal halide $(MCl)$ formed as a byproduct.For the reaction to be most favourable,the metal fluoride $(MF)$ should be soluble in the reaction medium,and the metal chloride $(MCl)$ should be insoluble (precipitate out).Among the given options,$RbF$ is the most soluble in organic solvents due to its lower lattice energy compared to $LiF$,$NaF$,and $KF$. Consequently,$RbCl$ is more likely to precipitate,driving the reaction forward.

In the replacement reaction:
$R-Cl + MF \rightarrow R-F + MCl$
The reaction will be most favourable if $M$ happens to be:

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In the replacement reaction:$R-Cl + MF \rightarrow R-F + MCl$The reaction will be most favourable if $M$ happens to be: