Practice question

MCQ

Question

Which reaction condition converts 2-methylpropan-2-ol to an alkene fastest?

Options

Choose one · Correct answer highlighted

Conc. H₂SO₄ at 140°C Correct Dilute H₂SO₄ at 80°C PCC in CH₂Cl₂ KMnO₄ at 25°C

Explanation

Conc. H₂SO₄ at 140°C rapidly dehydrates 2-methylpropan-2-ol, a tertiary alcohol, to 2-methylpropene via a stable tertiary carbocation in an E₁ mechanism.

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