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Question: Answered & Verified by Expert
In the replacement reaction


The reaction will be most favourable if $M$ happens to be
ChemistryChemical Bonding and Molecular StructureNEETNEET 2012 (Mains)
Options:
  • A $\mathrm{Na}$
  • B $\mathrm{K}$
  • C $\mathrm{Rb}$
  • D $\mathrm{Li}$
Solution:
2586 Upvotes Verified Answer
The correct answer is: $\mathrm{Rb}$
For the reaction,
The reaction will be faster with $\mathrm{Rb}$ because lattice energy of RbF is less than LiF, NaF, KF.

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