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STD 12 - 7. Alcohol, phenol and ethers — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 7. Alcohol, phenol and ethers4 Marks
MCQ
Assertion : Phenol undergo Kolbe reaction, ethanol does not.
Reason : Phenoxide ion is more basic than ethoxide ion
  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • ✓
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: C.
If the Assertion is correct but Reason is incorrect.
c
It is correct that sodium phenoxide (sodium salt of phenol) and $CO_2$ on heating form sodium salicylate. This is known as Kolbe’s reaction. Ethanol does not respond to this reaction. Therefore, Assertion is true. But the Reason that phenoxide ion is more basic than ethoxide ion is not correct

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