Question 1

Which statement best describes the primary concept behind VSEPR theory?

Accepted Answer

Electron pairs around a central atom arrange themselves as far apart as possible to minimize repulsion.

Question 2

What is the molecular geometry and approximate bond angle of NF$_3$?

Accepted Answer

Trigonal pyramidal, $107.5^	ext{o}$

Question 3

Which of the following molecules is nonpolar and has a linear molecular geometry?

Accepted Answer

CO$_2$

Question 4

A molecule has three bonding regions and no lone pairs on the central atom. What is its electron geometry and bond angle?

Accepted Answer

Trigonal planar, $120^	ext{o}$

Question 5

Which intermolecular force is strongest in H$_2$O?

Accepted Answer

Hydrogen bonding

Question 6

Given the Lewis structure for PF$_3$, what is the molecular geometry and major intermolecular force present?

Accepted Answer

Trigonal pyramidal, dipole-dipole forces

Question 7

Which molecule below has a tetrahedral electron geometry but a bent molecular geometry?

Accepted Answer

H$_2$S

Question 8

What is the bond angle in a molecule with a linear geometry?

Accepted Answer

$180^	ext{o}$

Question 9

Which of the following molecules is polar and has a trigonal pyramidal molecular geometry?

Accepted Answer

NH$_3$

Question 10

A patient is exposed to carbon monoxide (CO). Based on its molecular geometry and polarity, which intermolecular force is most relevant to its interaction with hemoglobin?

Accepted Answer

Dipole-dipole forces

Question 11

Which of the following ions has resonance structures and a trigonal planar geometry?

Accepted Answer

NO$_3^-$

Question 12

Which statement correctly describes the difference between electron geometry and molecular geometry?

Accepted Answer

Electron geometry includes both bonding pairs and lone pairs, while molecular geometry considers only the arrangement of atoms.

Question 13

Which molecule would you expect to have the largest bond angle?

Accepted Answer

CO$_2$

Question 14

A molecule has four electron regions around the central atom, two of which are lone pairs. What is its molecular geometry?

Accepted Answer

Bent

Question 15

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

Accepted Answer

CCl$_4$

Question 16

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

Accepted Answer

Dispersion forces

Question 17

A molecule with the formula C$_2$H$_2$ has which molecular geometry and bond angle?

Accepted Answer

Linear, $180^	ext{o}$

Question 18

Which of the following molecules would have the greatest solubility in water due to its intermolecular forces?

Accepted Answer

NH$_3$

Question 19

Which molecule has a trigonal planar geometry and is nonpolar?

Accepted Answer

BF$_3$

Question 20

A nurse is preparing a solution of H$_2$S for a laboratory experiment. Which is the major intermolecular force present in H$_2$S?

Accepted Answer

Dipole-dipole forces

VSEPR Theory, Molecular Geometry, Polarity, and Intermolecular Forces Study Guide

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