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WBCS Preliminary Examination 2017 — General Studies · Question 117 of 200

Q117
General ScienceChemistry
Conversion of $RBr$ to $RMgBr$ requires
  1. a.Mg/dry ether/$N_2$-atmosphere
  2. b.Mg/moist ether/$N_2$-atmosphere
  3. c.Mg/ethanol/$N_2$-atmosphere
  4. d.Mg/dry ether/$O_2$-atmosphere

Answer: (A) Mg/dry ether/$N_2$-atmosphere

Grignard reagent formation requires strictly anhydrous (dry) ether as solvent and an inert atmosphere (nitrogen or argon), since Grignard reagents react violently with both moisture and oxygen.

Q116 Whole paperQ118
Conversion of RBr to RMgBr requires — WBCS Preliminary Examination 2017 Q117 | Prostuti360°