Home
Class 12
CHEMISTRY
Assertion: Ethers are not prepared by th...

Assertion: Ethers are not prepared by the dehydration of secondary and tertiary alcohols.
Reason : In the secondary and tertiary alcohols elimination competes over substitution during dehydration, alkenes are easily formed.

A

A.Both A and R are true and R is the correct explanation of A

B

B.Both Aand R are true but R is not the correct expanation for A

C

C. A is true R is false

D

D.both A and R is false

Text Solution

Verified by Experts

The correct Answer is:
A

The dehydration of secondary and tertiary alcohols to give-ethers is unsuccessful as elimination competes over substitution and as a consequence alkenes are easily formed.
Promotional Banner

Topper's Solved these Questions

  • ALCOHOL, PHENOL & ETHER

    BRILLIANT PUBLICATION|Exercise LEVEL II |100 Videos
  • ALCOHOL PHENOL AND ETHERS

    BRILLIANT PUBLICATION|Exercise LEVEL-II |40 Videos
  • ALCOHOLS, PHENOLS AND ETHERS

    BRILLIANT PUBLICATION|Exercise LEVEL III (Linked Comprehension Type) |12 Videos

Similar Questions

Explore conceptually related problems

Preparation of ethers by acid dehydration of secondary or tertiary alcohols is not a suitable method. Give reason.

Classify the following as primary,secondary and tertiary alcohols:

Lucas,test Is used to identify primary, secondary and tertiary alcohols:- Explain the process.

Primary,secondary and tertiary alcohols can be distinguished by Lucas test. What is Lucas reagent?

Lucas,test Is used to identify primary, secondary and tertiary alcohols:- Name the reagents used in the test.

Primary,secondary and tertiary alcohols can be distinguished by Lucas test. Write the observations for primary, secondary and tertiary alcohols in Lucas test.

Assertion: Alcohols are dehydrated to hydrocarbon in the presence of acidic zeolites. Reason: Zeolites are porous catalysts.

Assertion: Acid catalysed dehydration of tert-butanol proceeds faster than that of n-butanol. Reason: The-acid catalysed dehydration of an alcohol proceeds via the formation of a carbocation.

Assertion: Reaction of alcohols with SOCl_2 is catalysed by the presence' of a tertiary amine (R_(3)N) Reason: Tertiary amine promotes the reaction by reacting with the by product HCl. A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion B) Both Assertion and Reason are true and Reason is not the correct explanation of Assertion C) Assertion is true but Reason is false D) Both Assertion and Reason are false

BRILLIANT PUBLICATION-ALCOHOL, PHENOL & ETHER -LEVEL II (ASSERTION - REASON TYPE)
  1. Assertion: Alcohols have higher boiling points than ethers of comparab...

    Text Solution

    |

  2. Assertion: Commercially carboxylic acids are reduced to alcohols by co...

    Text Solution

    |

  3. Assertion: Ethers are not prepared by the dehydration of secondary and...

    Text Solution

    |

  4. Assertion: CO2 is non polar, while ROR is polar in nature. Reason: ...

    Text Solution

    |

  5. Assertion: t-Butyl methyl ether is not prepared by the reaction of t-b...

    Text Solution

    |

  6. Assertion: Anisole undergoes electrophilic substitution at o-and p-pos...

    Text Solution

    |

  7. Assertion: Acid catalysed dehydration of tert-butanol proceeds faster ...

    Text Solution

    |

  8. Assertion: Reaction of alcohols with SOCl2 is catalysed by the presenc...

    Text Solution

    |

  9. Assertion: Solubility of n-alcohl in water decreases with increase in ...

    Text Solution

    |

  10. Assertion: The bond angle in alcohols is slightly less than the tetr...

    Text Solution

    |

  11. Assertion: Addition reaction of water to but-1-ene in acidic medium yi...

    Text Solution

    |

  12. Assertion : Carbon oxygen bond length of phenol is slightly less than ...

    Text Solution

    |

  13. Assertion : In alcohols, the boiling point decreases with decrease in...

    Text Solution

    |

  14. Assertion : Alcohols and water are weaker acids than phenols. Reas...

    Text Solution

    |

  15. Assertion : Bromination of phenol takes place even in the absence of...

    Text Solution

    |

  16. Assertion : The cleavage of C-O bond in ethers takes place under dra...

    Text Solution

    |

  17. Assertion: Dipolemoment ofphenol is smaller than that of methanol. R...

    Text Solution

    |

  18. Assertion: Neopentyl alcohol on treatment with HCl gives neopentyl chl...

    Text Solution

    |

  19. Assertion: Phenoxide ion on treatment with an active alkyl h...

    Text Solution

    |

  20. Assertion:Phenol forms 2,4,6-tribromophenol on treatment with Br2 in c...

    Text Solution

    |