Chemical Bonding and Molecular Orbital Theory Quiz

Question 1

Which of the following molecular orbitals is generally lowest in energy?

Accepted Answer

σ bonding

Answer

π bonding

Answer

σ antibonding

Answer

π antibonding

Question 2

What is the bond order of a diatomic molecule with 8 electrons in bonding molecular orbitals and 4 electrons in antibonding molecular orbitals?

Accepted Answer

2

Answer

1

Answer

3

Answer

4

Question 3

Which of the following statements best describes the Linear Combination of Atomic Orbitals (LCAO) method?

Accepted Answer

Approximating molecular orbitals as linear combinations of atomic orbitals

Answer

Combining atomic nuclei to form molecules

Answer

Calculating the exact energy levels of molecules

Answer

Ignoring electron-electron interactions

Question 4

According to molecular orbital theory, which diatomic molecule is predicted to be unstable?

Accepted Answer

He₂

Answer

H₂

Answer

Li₂

Answer

Be₂

Question 5

Which type of interaction is primarily responsible for the formation of a sigma (σ) bond?

Accepted Answer

Head-on overlap of atomic orbitals

Answer

Side-by-side overlap of p orbitals

Answer

Overlap of d orbitals

Answer

Electrostatic attraction between ions

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