Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
KVPY2015ChemistryClassification of Elements and Periodicity in Properties

The Lewis acid strength of BBr ₃, BCl ₃ and BF ₃ is in the order

Options

  1. ABBr ₃ < BCl ₃ < BF ₃
  2. BBCl ₃ < BF ₃ < BBr ₃
  3. CBF ₃ < BCl ₃ < BBr ₃
  4. DBBr ₃ < BF ₃ < BCl ₃

Correct answer

C. BF ₃ < BCl ₃ < BBr ₃

Step-by-step solution

Order of back bonding array l Back bonding & 2 p-2 p 2 p-3 p 2 p-4 p Stronger is the back bonding weaker the tendency to act as a lewis acid array BF ₃ < BCl ₃ < BBr ₃

Practice Classification of Elements and Periodicity in Properties on Quantrex Academy →

More from Classification of Elements and Periodicity in Properties

Which of the following is an INCORRECT match? 2026Match List-I with List-II: List-I (Element-Atomic number) List-II (Position in periodic table) (a) Ra – 88 (i) 4^ th period, 13^ th group (b) Ga – 31 (ii) 6^ th period, 6^ th group 2026Which element from following has positive electron gain enthalpy? 2026Which of the following elements belongs to group 2 and sixth period of periodic table? 2026Identify the most electronegative element by the following. 2026Identify increasing order of acidity for following diprotic acids in aqueous solutions. 2026Identify the group of periodic table that contains element Astatine. 2026What happens to the size of atoms in p-block elements when we move from left to right in the same period? 2026 Full Classification of Elements and Periodicity in Properties list All KVPY PYQs