According to valence shell electron pair repulsion theory, the repulsive forces between the electron pair of central atom of molecule are in the order:
Correct answer: A. Lone Pair - Lone Pair > Lone Pair - Bond Pair > Bond Pair - Bond Pair
- A. Lone Pair - Lone Pair > Lone Pair - Bond Pair > Bond Pair - Bond Pair
- B. Lone Pair - Bond Pair > Lone Pair - Lone Pair > Bond Pair - Bond Pair
- C. Bond Pair - Bond Pair > Lone Pair - Lone Pair > Lone Pair - Bond Pair
- D. Lone Pair - Bond Pair > Bond Pair - Bond Pair > Lone Pair - Lone Pair
Explanation
According to the VSEPR theory, lone pairs of electrons occupy more space than bonding pairs. As a consequence, this is an order of the magnitude of repulsion. Lone Pair - Lone Pair > Lone Pair - Bond Pair > Bond Pair - Bond Pair The greatest repulsion is between 2 lone pairs. Followed by repulsion between one lone pair and one bonding pair. The weakest repulsion is between 2 bonding pairs, the magnitude of repulsion between bonding pairs of electrons depends on the electronegativity difference between a central atom and the other atoms.
Last updated
About Chemical Bonding
Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
Practise Chemical Bonding
964 free Chemical Bonding MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
50% inversion of configuration and 50% retention of configuration observed is characteristics of mechanism:
A bonding electron pair is attracted by of atoms?
A Cl₂ molecule is formed by the overlap of:
A co-ordinate covalent bond is present in:
A covalent bond formed by the parallel overlap of p-orbitals is a weaker bond called: