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7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistry7. Alcohol, phenol and ethers1 Mark
MCQ
$X$ can be -
  • A
    conc. $H_2SO_4$
  • ✓
    $POCl_3$ / Pyridine
  • C
    conc.$H_3PO_4$
  • D
    None of these
✓

Answer

Correct option: B.
$POCl_3$ / Pyridine
b
In case of conc. $H_2SO_4$ & conc. $H_3PO_4 , E_1$ mechanism will be followed ring expansion will occur but with $POCl_3$ / Pyridine $E_2$ mechanism.

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