NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice
B C l 3 is a planar molecule whereas N C l 3 is pyramidal because
Options
- Anitrogen atom is smaller than boron atom
- BB C l 3 has no lone pair but N C l 3 has a lone pair of electrons on their central atoms
- CB - C l bond is more polar than N - C l bond
- DN - C l bond is more covalent than B - C l bond
Correct answer
B. B C l 3 has no lone pair but N C l 3 has a lone pair of electrons on their central atoms
Step-by-step solution
There is no lone pair on boron in B C l 3 hence no repulsion takes place. There is a lone pair on nitrogen in N C l 3 hence repulsion takes place. Therefore B C l 3 is planar molecule but N C l 3 is pyramidal molecule.