Home
Class 12
CHEMISTRY
Assertion: Alcohols are easily protonate...

Assertion: Alcohols are easily protonated thena phenols.
Reason: Alcohols undergo intermolecular hydrogen bonding due to the presence of highly electornegative oxygen.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
B
In phenols, the lone pairs of electrons on the oxygen atom are delocalised over the benzene ring due to resonance and hence are not easily available for protonation. On the other hand, in alcohols, the lone pairs of electrons on oxygen atom are localized due to the absence of resonance and hence are easily available for protonation.
Promotional Banner

Topper's Solved these Questions

  • ALCOHOLS, PHENOLS AND ETHERS

    ERRORLESS|Exercise PAST YEARS QUESTIONS |36 Videos

  • ALDEHYDES AND KETONES

    ERRORLESS|Exercise ASSERTION AND REASON|10 Videos

Similar Questions

Explore conceptually related problems

Unlike phenols, alcohols are easily protonated.

Assertion (A) Boiling points of alcohols and ethers are high. Reason (R) They can form intermolecular hydrogen-bonding.

Assertion: Boiling and melting point of amides are higher than corresponding acids Reason : It is due to strong intermolecular hydrogen bonding in their molention.

Assertion : Boiling point of p-nitrophenol is greater than that of o-nitrophenol. Reason : There is intramolecular hydrogen bonding in p-nitrophenol and intermolecular hydrogen bonding in o-nitrophenol.

Assertion:The boiling and melting point of amides are higher than corresponding acids. Reason:It si due to strong intermolecular hydrogen bonding in their molecules.

ERRORLESS-ALCOHOLS, PHENOLS AND ETHERS-Assertion & Reason
  1. Statement I: A triester of glycerol with stearic acid on boiling with ...

    Text Solution

    |

  2. Assertion : Phenol is a weak acid than ethanol. Reason : Groups wit...

    Text Solution

    |

  3. Assertion : The resonance structure of H-underset(H)underset(|)ove...

    Text Solution

    |

  4. Assertion : Phenol undergoes Kolbe's reaction whereas ethanol does ...

    Text Solution

    |

  5. Asserion: Lucas reagent is a micture of anhydrous ZnCI(2) and concentr...

    Text Solution

    |

  6. Assertion: Resorchiral turns FeCI(3) solution purple. Reason: Reasor...

    Text Solution

    |

  7. Assertion: Alcohol and ohenol can be distinguished by sodium hydroxide...

    Text Solution

    |

  8. Assertion : The major product formed by heating C(6)H(5)CH(2)OCH(3) wi...

    Text Solution

    |

  9. Assertion: The pK(a) of acetic acid is lower than that of phenol. R...

    Text Solution

    |

  10. Assertion : Alcoholic fermentation involves conversion of sugar into...

    Text Solution

    |

  11. Assertion : The water solubility of the alcohols follow the order t-...

    Text Solution

    |

  12. Acid catalysed dehydration of t-butanol is faster than that of n-butan...

    Text Solution

    |

  13. Assertion : Phenols cannot be converted into esters by direct reacti...

    Text Solution

    |

  14. Assertion: Alcohols are easily protonated thena phenols. Reason: Alc...

    Text Solution

    |

  15. Assertion : Phenol is a weak acid than ethanol. Reason : Groups wit...

    Text Solution

    |

  16. Assertion : (CH(3))(3)C-Br and CH(3)CH(2)O"N"a react to form (CH(3))(3...

    Text Solution

    |

  17. Assertion : Rate of hydrolysis of methyl chloride to methanol is highe...

    Text Solution

    |

  18. Assertion. t-Butyl Methyl ether is not prepared by the reaction of t-b...

    Text Solution

    |

  19. Assertion: The ease of dehydration of the following alcohols is R...

    Text Solution

    |

  20. Assertion: Alcohols have higher boiling points than ethers of comparab...

    Text Solution

    |