Question 1

According to Valence Shell Electron Pair Repulsion (VSEPR) Theory, what primarily determines the geometry of a molecule?

Accepted Answer

The minimization of repulsion between electron groups on the central atom

Question 2

How many electron groups are present on the central nitrogen atom in ammonia ($$NH_3$$)?

Accepted Answer

$$4$$

Question 3

Which of the following molecules has $$sp^3d^2$ hybridization on the central atom?

Accepted Answer

SeCl$$_6$$

Question 4

What is the hybridization of the sulfur atom in $$SBr_4$$?

Accepted Answer

$$sp^3d$

Question 5

How many unhybridized orbitals does the beryllium atom possess in $$BeCl_2$$?

Accepted Answer

$$2$$

Question 6

Which principle states that an orbital can hold a maximum of two electrons with opposite spins?

Accepted Answer

Pauli Exclusion Principle

Question 7

In molecular orbital theory, what is the effect of filling anti-bonding molecular orbitals?

Accepted Answer

It decreases the stability of the molecule

Question 8

What is the bond order of the $$NO^-$$ ion using the molecular orbital theory formula $$	ext{Bond Order} = \frac{1}{2}(	ext{Bonding Electrons} - 	ext{Antibonding Electrons})$$?

Accepted Answer

$$2.5$$

Question 9

Which of the following species has the strongest bond according to molecular orbital theory?

Accepted Answer

$$O_2$$^+$$

Question 10

For the molecule $$CO$$, which element's atomic orbitals are lower in energy and why?

Accepted Answer

Oxygen, because it is more electronegative

Question 11

What is the correct electron configuration for the $$P_2$$ molecule using molecular orbital theory?

Accepted Answer

$$\sigma_{2s}^2\,\sigma_{2s}^*{}^2\,\pi_{2p}^4\,\sigma_{2p}^2$$

Question 12

Which of the following statements about the $$CN$$ molecule is correct according to molecular orbital theory?

Accepted Answer

If an electron is removed to give $$CN^+$$, the bond length decreases

Question 13

What is the bond order of $$N_2$$^{2-}$$ using molecular orbital theory?

Accepted Answer

$$2$$

Question 14

Which of the following best describes the difference in molecular orbital diagrams for $$O_2$$ and $$N_2$$?

Accepted Answer

The order of $$\sigma_{2p}$$ and $$\pi_{2p}$$ orbitals is reversed for $$O_2$$

Question 15

Which of the following is true about the bond order and stability of a molecule?

Accepted Answer

As bond order increases, bond strength increases and bond length decreases

Question 16

Which of the following best describes the electron distribution in molecular orbital theory?

Accepted Answer

Electrons are delocalized throughout the molecule

Question 17

For a heteronuclear diatomic molecule, which element's atomic orbitals are used to determine the molecular orbital diagram?

Accepted Answer

The more electronegative element

Question 18

What is the bond order of the $$SH^-$$ ion using the formula $$	ext{Bond Order} = \frac{1}{2}(	ext{Bonding Electrons} - 	ext{Antibonding Electrons}) if $$there are 2 bonding and 0 antibonding electrons?

Accepted Answer

$$1$$

Question 19

Which of the following is a correct statement about hybridization?

Accepted Answer

Hybridization allows for the formation of more bonds and increases stability

Chemical Bonding II: VSEPR, Hybridization, and Molecular Orbital Theory

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