Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas JEE Main2020ChemistryChemical Bonding and Molecular StructurePractice

Arrange the following in the correct order of Lewis acidity: BF 3 , BCl 3 , BBr 3 .

Options

  1. ABF 3 > BBr 3 > BCl 3
  2. BBF 3 > BCl 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

In BF 3 , BCl 3 and BBr 3 each will shown p π - p π back bonding as follows. Extant of overlapping as the 2 p − 2 p > 2 p − 3 p > 2 p − 4 p difference between the size of p orbital increases the extent of overlapping decreases the availability of vacant orbital increases and the acidic character increases. Hence correct order of Lewis acidity represented by option (BF 3 < BCl 3 < BBr 3 ) .

Practice Chemical Bonding and Molecular Structure on Quantrex Academy →

More from Chemical Bonding and Molecular Structure

The correct order of dipole moments for the given species is 2026Consider the following species: SOCl ₂ , XeOF ₄ , ClF ₃ , ClF ₅ , XeF ₅^+ , SO ₃²⁻ , XeF ₃^+ , SF ₄ List-I contains different molecular shapes and List-II contains total number of 2026The correct order of ONO bond angle in the given species is 2026Bromine trifluoride autoionizes to form BrF ₂^ and BrF ₄^ . The shapes of the cation and anion are respectively ________, and ________. 2026Given below are two statements : Statement I : The number of compounds among SO₂ , SO₃ , SF₄ , SF₆ and H₂ S in which sulphur does not obey the Octet rule is 3 . Statement II : Amon 2026Given below are two statements : Statement I : F ₂ O Statement II : SiF ₄ , SnF ₄ and PbF ₄ are ionic in nature. In the light of the above statements, choose the correct answer fro 2026The pairs among A = [ SO ₃²⁻, CO ₃²⁻] , B = [ O ₂²⁻, F ₂] , C = [ CN ^-, CO ] , D = [ NH ₃, H ₃ O ^+] and E = [ MnO ₄²⁻, CrO ₄²⁻] that do not have similar Lewis dot structure are 2026The covalent radii of atoms A and B are r_A and r_B , respectively. The covalent bond length and total length of AB molecule are respectively 2026 Full Chemical Bonding and Molecular Structure list All NTA Abhyas JEE Main PYQs