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AIIMS 2009
Exam
AIIMS
Year
2009
Subject
Chemistry
Chapter
Chemical Bonding and Molecular Structure

AIIMS 2009 · Chemistry · Chemical Bonding and Molecular Structure

In solvents like DMSO, acetonitrile, F^ - ion of dissolved NaF is...

In solvents like DMSO, acetonitrile, F−\mathrm{F}^{-}ion of dissolved NaF\mathrm{NaF} is more reactive than in methyl alcohol becasue

Options

  1. ACH3OH\mathrm{CH}_3 \mathrm{OH} is more polar than DMSO and CH3CN\mathrm{CH}_3 \mathrm{CN}
  2. BCH3OH\mathrm{CH}_3 \mathrm{OH} is less polar than DMSO and CH3CN\mathrm{CH}_3 \mathrm{CN}
  3. Cunsolvated F−\mathrm{F}^{-}ion is DMSO\mathrm{DMSO} or CH3CN\mathrm{CH}_3 \mathrm{CN} acts more efficiently as nucleophile
  4. D−OH-\mathrm{OH} group is a better leaving group than F−\mathrm{F}^{-} ion.

Correct answer

C. unsolvated F−\mathrm{F}^{-}ion is DMSO\mathrm{DMSO} or CH3CN\mathrm{CH}_3 \mathrm{CN} acts more efficiently as nucleophile

Step-by-step solution

In methyl alcohol, F−\mathrm{F}^{-}ion is solvated but in DMSO or CH3CN\mathrm{CH}_3 \mathrm{CN} (aprotic solvent) F−\mathrm{F}^{-}ion is not solvated. Unsolvated F−\mathrm{F}^{-}ion acts more efficiently as a nucleophile.
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