Question 1

Which of the following best describes the electron group geometry and hybridization of the central atom in $$\mathrm{PH_3$}$$?

Accepted Answer

Tetrahedral, $$sp^3$$

Question 2

In the molecule $$\mathrm{C_2H_2} ($$acetylene), what is the hybridization of each carbon atom and what is the observed bond angle between the atoms?

Accepted Answer

Each carbon is $$sp$$ hybridized; bond angle is $$180^\circ$$

Question 3

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

Accepted Answer

$$\mathrm{$$XeF_4$$}$$

Question 4

Given the molecular orbital diagram for $$\mathrm{O_2$}$$, what is its bond order?

Accepted Answer

$$2$$

Question 5

Which of the following diatomic molecules is paramagnetic according to molecular orbital theory?

Accepted Answer

$$\mathrm{O_2$}$$

Question 6

For $$\mathrm{CO}$$, calculate the bond order using the molecular orbital diagram.

Accepted Answer

$$3$$

Question 7

Which molecule has the highest bond energy based on molecular orbital theory?

Accepted Answer

$$\mathrm{H_2$}$$

Question 8

What is the electron group geometry and hybridization of the central atom in $$\mathrm{SF_6$}$$?

Accepted Answer

Octahedral, $$sp^3d^2$

Question 9

In benzene ($$\mathrm{C_6H_6}$$), what is the hybridization of each carbon atom and the observed bond angle?

Accepted Answer

Each carbon is $$sp^2$$ hybridized; bond angle is $$120^\circ$$

Question 10

Which of the following molecules has a central atom with $$sp^3d$ hybridization?

Accepted Answer

$$\mathrm{PF_5$}$$

Question 11

For $$\mathrm{N_2$}$$, what is the bond order according to its molecular orbital diagram?

Accepted Answer

$$3$$

Question 12

Which of the following molecules has a linear electron group geometry and $$sp$$ hybridization at the central atom?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 13

In $$\mathrm{CH_2Cl_2}$$, what is the hybridization of the central carbon atom?

Accepted Answer

$$sp^3$$

Question 14

Which of the following statements about $$\mathrm{O_2$} is $$correct?

Accepted Answer

$$\mathrm{O_2$}$$ has a bond order of 2 and is paramagnetic.

Question 15

Which molecule has a central atom with a lone pair and $$sp^3$$ hybridization?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 16

In the molecule $$\mathrm{H_2O}$$, what is the electron group geometry and hybridization of the oxygen atom?

Accepted Answer

Tetrahedral, $$sp^3$$

Question 17

Which of the following molecules has a central atom with $$sp^2$$ hybridization and a trigonal planar geometry?

Accepted Answer

$$\mathrm{BF_3$}$$

Question 18

For $$\mathrm{F_2$}$$, what is the bond order according to its molecular orbital diagram?

Accepted Answer

$$1$$

Question 19

Which of the following molecules is expected to have the lowest bond order?

Accepted Answer

$$\mathrm{He_2$}$$

Question 20

Which molecule has a central atom with $$sp^3d^2$ hybridization and square planar geometry?

Accepted Answer

$$\mathrm{$$XeF_4$$}$$

Hybridization, Molecular Geometry, and Molecular Orbital Theory: Study Notes

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