Chemistry Alkyl Halides BUMHS 2024
PMDC Verified Question 12 of 13
Alkyl halides can yield ethers when heated in the presence of the metallic compound:
A
Ag\(_2\)O
B
CuO
C
Cu\(_2\)O\(_2\)
D
Fe\(_2\)O\(_3\)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Ag\(_2\)O
Concept:

Alkyl halides can undergo substitution reactions with metal oxides to form oxygen-containing functional groups.

Solution:

  • When an alkyl halide is heated with dry silver oxide (\( Ag_2O \)), two molecules of the alkyl halide couple with the oxygen atom.
  • The reaction proceeds as follows: \( 2R-X + Ag_2O \xrightarrow{\Delta} R-O-R + 2AgX \downarrow \).
  • The resulting product is an ether (R-O-R).
  • Note: If moist silver oxide is used, it behaves as \( AgOH \) and yields an alcohol instead. The question implies the use of dry \( Ag_2O \).


Why other options are incorrect:

  • Options B, C, & D: Copper and iron oxides are not standard reagents used for ether synthesis via nucleophilic substitution of alkyl halides. Silver's strong affinity for halogens (driving the precipitation of AgX) makes \( Ag_2O \) uniquely effective.

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