Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • Help me answer: - Some p-Block elements - NEET

The tendency of BF_{3} , BCl_{3} and BBr_{3}  to behave as Lewis acid decrease in the sequence:

  • Option 1)

    BCl_{3}> BF_{3}> BBr_{3}

  • Option 2)

    BBr_{3}> BCl_{3}> BF_{3}

  • Option 3)

    BBr_{3}> BF_{3}> BCl_{3}

  • Option 4)

    BF_{3}> BCl_{3}> BBr_{3}

 

Answers (1)

best_answer

 

@11865

- wherein

 

Due to small size and high electronegativity

 

  Lewis acid character of Boron trihalides obey the order : BBr_{3}> BCl_{3> }BF_{3}

BF_{3}  is a weak lewis acid because of p\pi -p\pi lock bonding between the 2p ortibals of F and vacant 2p ortibals of B. This result in fall of the electron dificient nature of BF_{3} and lewis it a number lewis acid. Such back bonding is not possible in BCl_{3}  and BBr_{3} due to huge difference in orbital energies.


Option 1)

BCl_{3}> BF_{3}> BBr_{3}

Incorrect Option

Option 2)

BBr_{3}> BCl_{3}> BF_{3}

Correct Option

Option 3)

BBr_{3}> BF_{3}> BCl_{3}

Incorrect Option

Option 4)

BF_{3}> BCl_{3}> BBr_{3}

Incorrect Option

Posted by

divya.saini

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

NEET UG 2024 exam city slip out at neet.ntaonline.in; over 25 lakh candidates to appear
anam-khan

NEET UG city intimation slip likely today at exams.nta.ac.in/NEET; barred item at exam centre
anam-khan

NEET UG 2024 exam city slip soon; admit card updates

Latest Question