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MHT CET202525 Apr 2025Morning ShiftChemistryAlcohols Phenols and EthersActual

Which of the following compounds is formed when ether is dissolved in cold concentrated sulphuric acid?

Options

  1. AAlkanol
  2. BAlkanoic acid
  3. CAlkyl hydrogen sulphate
  4. DOxonium salt

Correct answer

D. Oxonium salt

Step-by-step solution

Ether Protonation with Cold Concentrated Sulfuric Acid Ethers act as Lewis bases due to the oxygen atom's lone pairs, making them susceptible to protonation by strong acids like concentrated sulfuric acid. The protonated ether forms an oxonium ion, which then combines with the bisulfate ion ( HSO₄^- ) to produce an oxonium salt. R-O-R' + H₂ SO₄ [R- + O (H)-R'] HSO₄^- For diethyl ether: CH₃CH₂-O-CH₂CH₃ + H₂ SO₄ [CH₃CH₂- + O (H)-CH₂CH₃] HSO₄^- The product is diethyl oxonium hydrogen sulfate, confirming the formation

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