Home
Class 12
CHEMISTRY
The base with lowest pK(a) value is...

The base with lowest `pK_(a)` value is

A

`N equiv C CH_(2)NH_(2)`

B

`Et_(3)N`

C

`NH_(3)`

D

`HO-CH_(2)CH_(2)NH_(2)`.

Text Solution

Verified by Experts

The correct Answer is:
A
As the basicity decreases `pKa` value decreases. Due to the presence of strong electron with drawing group (-I effect) (A) is the weakest base. The `N equiv C-CH_(2)NH_(2)` has the lowest electron density on N atom and is the weakest base.
`:. N equiv C-CH_(2)NH_(2)` has lowest `pK_(a)` value.
Promotional Banner

Topper's Solved these Questions

  • CYANIDES, ISOCYANIDES, NITROCOMPOUNDS AND AMINES

    DINESH PUBLICATION|Exercise Brain Teasers -13|40 Videos

  • CYANIDES, ISOCYANIDES, NITROCOMPOUNDS AND AMINES

    DINESH PUBLICATION|Exercise Unit test - 8|20 Videos

  • CYANIDES, ISOCYANIDES, NITROCOMPOUNDS AND AMINES

    DINESH PUBLICATION|Exercise Assertion- Reason|24 Videos

  • CO-ORDINATION COMPOUNDS

    DINESH PUBLICATION|Exercise Brain storming multiple choice question|12 Videos

  • D-AND -F BLOCK ELEMENTS

    DINESH PUBLICATION|Exercise BRAIN STORMING MULTIPLE CHOICE QUESTIONS (MCQS)|13 Videos

Similar Questions

Explore conceptually related problems

Among the following the lowest pK_(a) value is of :

Among the following acid which has the lowest pK_(a) value ?

Among the acids which have lowest pK_(a) value ?

Among the following acids, which has the lowest pK_(a) value?

Among the following acids which has the lowest pK_(a) value-

Which of the following acids have the lowest pK_(a) value :-

Which of the following alcohols is expected to have a lowest pK_(a) value ?

DINESH PUBLICATION-CYANIDES, ISOCYANIDES, NITROCOMPOUNDS AND AMINES-Ultimate Preparatory Package
  1. Amongest the following the most basic in nature is

    Text Solution

    |

  2. The correct order of increasing ease of protonation is

    Text Solution

    |

  3. The base with lowest pK(a) value is

    Text Solution

    |

  4. Ethylamine on reaction wih bromine in aq. Sodium carbonate solution gi...

    Text Solution

    |

  5. Which of the following compounds will not liberate nitrogen gas on rea...

    Text Solution

    |

  6. Identify the compound X

    Text Solution

    |

  7. Which of the following statements regarding acetanilide is not true ?

    Text Solution

    |

  8. Compound A on reaction with PCl(5) followed by ammonia gives B. B reac...

    Text Solution

    |

  9. 2, 4-Dinitroaniline underset((ii)" Anisole")overset((i) NaNO(2)//HCl (...

    Text Solution

    |

  10. The correct order of increasing basicity of the following compound is

    Text Solution

    |

  11. The most basic compound among the following is-

    Text Solution

    |

  12. Which of the amine will not react with diethyl oxalate ?

    Text Solution

    |

  13. Which attacking species is generated from nitrating mixture during the...

    Text Solution

    |

  14. The IUPAC name of the compound NC-CH(2)-overset(CN)overset(|)(CH)-CH...

    Text Solution

    |

  15. In the above sequence, II is :

    Text Solution

    |

  16. What is correct about the given below

    Text Solution

    |

  17. When methyl carbylamine is heated for some time it is converted into

    Text Solution

    |

  18. Which of the following will give white precipitate with an aqueous sol...

    Text Solution

    |

  19. Which of the following reactions will give tetra methyl hydrazine ?

    Text Solution

    |

  20. An organic molecule belonging to the category of schiff's base is subj...

    Text Solution

    |