Question 1

Which of the following molecules has a trigonal planar electron geometry and is nonpolar?

Accepted Answer

BF\_3

Question 2

According to VSEPR theory, what is the expected bond angle in a molecule with a tetrahedral electron geometry and no lone pairs on the central atom?

Accepted Answer

$$109.5^\circ$$

Question 3

Which of the following molecules is expected to have the smallest bond angle?

Accepted Answer

H\_2O

Question 4

What is the molecular geometry and hybridization of the central atom in SF\_4?

Accepted Answer

Seesaw, sp\^3d

Question 5

Which of the following molecules is polar due to its molecular geometry?

Accepted Answer

NH\_3

Question 6

Which intermolecular force is present in all molecules, regardless of polarity?

Accepted Answer

London dispersion forces

Question 7

Which of the following molecules can form hydrogen bonds with water?

Accepted Answer

NH\_3

Question 8

What is the bond order of O\_2 according to Molecular Orbital Theory?

Accepted Answer

$$2$$

Question 9

Which molecule is paramagnetic according to its MO diagram?

Accepted Answer

O\_2

Question 10

Which of the following statements about polarizability is correct?

Accepted Answer

Polarizability increases as molecular size increases.

Question 11

Which of the following molecules has a square planar molecular geometry?

Accepted Answer

XeF\_4

Question 12

What is the hybridization of the central atom in CH\_2O (formaldehyde)?

Accepted Answer

sp\^2

Question 13

Which of the following molecules is expected to have the highest boiling point due to hydrogen bonding?

Accepted Answer

CH\_3CH\_2OH

Question 14

Which of the following best describes the difference between electron geometry and molecular geometry?

Accepted Answer

Electron geometry considers all electron groups (bonding and lone pairs), while molecular geometry considers only the positions of atoms.

Question 15

Which of the following molecules is nonpolar despite having polar bonds?

Accepted Answer

CO\_2

Question 16

Which intermolecular force is the strongest among molecules of similar size and mass?

Accepted Answer

Hydrogen bonding

Question 17

What is the expected molecular geometry of SO\_2 according to VSEPR theory?

Accepted Answer

Bent

Question 18

Which of the following molecules has sp\^3d\^2 hybridization at the central atom?

Accepted Answer

SF\_6

Question 19

Which of the following molecules is expected to be planar?

Accepted Answer

CH\_2O

Question 20

Which of the following best explains why O\_2 is paramagnetic?

Accepted Answer

It has unpaired electrons in its molecular orbitals.

Chapter 8 Student Notes

Guida di studio - Domande di pratica