Valence Band Theory Quiz

How sigma bond produced?

• Forms from head-on overlapping between one s with another s orbital, one s orbital with a p orbital, and one p with another p orbital

• Forms when two electrons collide and bounce off each other, creating a chemical force field

• Forms when electrons orbit the atom in a square shape and link the atoms together.

• Forms when protons from two different atoms merge into a single nucleus.

How pi bond produced?

• Formed when two atoms are held together by magnetic forces created by their nuclei.

• Created when electrons spin in opposite directions and generate a vortex that binds atoms.

• Sideways overlapping of one p orbital with another p orbital.

• Forms when d orbitals stretch into a square and connect the two atoms.

By using valence bond theory, what is the hybridization of O2?

• sp3d

• sp2

• sp

• sp3

What is the shape of sp hybridization?

• Tetrahedral

• Octahedral

• Triangle

• Linear

What is the shape of sp3 hybridization?

• Trigonal Planar

• Tetrahedral

• Square planar

• Trigonal Bypyramidal

What factors affect the strength of bond?

• Size

• Shape

• Distant between two side of atoms

• Distant between two nuclei of atoms

What is the primary focus of Valence Bond Theory (VBT)?

• VBT focuses on the molecular geometry of a molecule

• VBT focuses on type of hybridizaton of a central atom

• VBT focuses on how atomic orbitals overlap to form covalent bonds in molecules.

• VBT focuses on how atoms merge completely to form a single giant nucleus in a molecule.

Which orbitals overlap to form a sigma bond in O2?

• Two Oxygen 2s orbitals overlap to form a sigma bond in O2.

• Two Oxygen 2s orbitals overlap side-by-side to form a sigma bond in O2.

• One 2p orbital of oxygen and one 2s of oxygen overlap.

• One 2p orbital of oxygen and one 2p of oxygen overlap.

What type of bond is found in an ethane (C2H6) molecule?

• Ethane contains both sigma (σ) and pi (π) bonds because it has double bonds between the carbon atoms.

• Ethane has ionic bonds between carbon and hydrogen atoms due to the transfer of electrons.

• Ethane has single (sigma) bonds between carbon atoms and between carbon and hydrogen atoms.

• Ethane consists of triple bonds between the carbon atoms, with one sigma bond and two pi bonds.

What is the typical bond angle in a molecule with sp2 hybridization?

• 120 degrees

• 109.5 degrees

• 120 and 109.5 degrees

• 90 and 120 degrees