Quiz 2 - Bonding Theories | Bonding Theories
General Chemistry 1 - Quiz 2 - Bonding Theories
Which of the following statements about valence bond theory is correct?
Valence bond theory explains that atomic orbitals overlap to form bonds, resulting in a stable molecule with lower potential energy.
Which type of hybridization results in a trigonal planar molecular geometry?
sp2 hybridization involves the mixing of one s orbital and two p orbitals, resulting in three sp2 hybrid orbitals with 120° bond angles, forming a trigonal planar geometry.
What is the hybridization and geometry of SF6?
SF6 has six electron domains around the central sulfur atom, leading to sp3d2 hybridization and an octahedral geometry with 90° bond angles.
Which of the following molecules contains a triple bond?
N2 contains one sigma (σ) bond and two pi (π) bonds, forming a triple bond and resulting in a bond order of 3.
In molecular orbital theory, what is the primary difference between bonding and antibonding molecular orbitals?
Electrons in bonding molecular orbitals (MOs) stabilize the molecule by lowering its energy, whereas electrons in antibonding MOs destabilize it by increasing its energy.
What is the bond order of the oxygen molecule (O2) according to molecular orbital theory?
O2 has a bond order of 2, calculated by the formula: (Number of bonding electrons - Number of antibonding electrons) / 2, resulting in (10 - 6) / 2 = 2.
Which of the following species is paramagnetic?
O2 is paramagnetic because it has two unpaired electrons in its π*2p molecular orbitals, making it attracted to a magnetic field.
In a molecular orbital diagram for B₂, which of the following is true about the relative energy levels of the molecular orbitals?
For B2, the π2p orbitals are lower in energy than the σ2p orbital due to the nature of the atomic orbital interactions in lighter diatomic molecules.
Which molecule exhibits sp hybridization at the central atom?
In CO2, the central carbon atom undergoes sp hybridization, forming two sp hybrid orbitals that result in a linear geometry with bond angles of 180°.
What type of bonds are present in a molecule of ethene (C2H4)?
Ethene (C2H4) contains five σ bonds (four C-H σ bonds and one C-C σ bond) and one π bond (resulting from the side-by-side overlap of p orbitals in the C=C double bond).