VSEPR Theory and Sigma Pi Bond of VBT

Who proposed the Valence Shell Electron Pair Repulsive Theory for the structure of covalent molecules?

• Sidgwick and Powell

• Lewis and Pauling

• Bohr and Rutherford

• Dalton and Thomson

According to the Valence Shell Electron Pair Repulsive Theory, what determines the shape of a molecule?

• Repulsion between electron pairs in the valence shell of the central atom

• The atomic number of the central atom

• The mass of the molecule

• The number of protons in the nucleus

What are bond pairs according to the Valence Shell Electron Pair Repulsive Theory?

• Paired electrons of the central atom that do not take part in sharing

• The result of sharing of unpaired electrons of central atom with unpaired electrons of surrounding atoms

• Electrons that are always paired and inactive

• Electrons that are not present in the central atom

Which of the following best describes lone pairs?

• Electrons that are shared between atoms

• Paired electrons of the central atom which do not take part in sharing

• Unpaired electrons of surrounding atoms

• Electrons that always form bonds

Why do bond pairs and lone pairs repel each other?

• Because they are positively charged

• Because they are similarly charged

• Because they are neutral

• Because they are attracted to each other

According to the Valence Shell Electron Pair Repulsive Theory, how do electron pairs arrange themselves around the central atom?

• As close together as possible

• In a random manner

• As far apart as possible to minimize the force of repulsion

• In a straight line

According to the Valence Shell Electron Pair Repulsive (VSEPR) Theory, which type of electron pair repulsion is the strongest?

• Lone pair-Lone pair repulsion

• Lone pair-Bond pair repulsion

• Bond pair-Bond pair repulsion

• Bond pair-Lone pair repulsion

In VSEPR theory, how are multiple bonds (double and triple) treated when determining the geometry of a molecule?

• As a single bond

• As two separate bonds

• As three separate bonds

• As lone pairs

Which of the following statements is true regarding the shape of a molecule according to VSEPR theory?

• It depends on the total number of electron pairs (bonding and lone pairs)

• It depends only on the number of atoms

• It depends only on the number of lone pairs

• It depends only on the number of bond pairs

In the context of VSEPR theory, what does the symbol "X" represent in a hypothetical molecule?

• A central atom

• A bonded atom

• A lone pair of electrons

• A double bond