Question 1

According to Valence Shell Electron Pair Repulsion (VSEPR) theory, what is the primary factor that determines the three-dimensional arrangement of atoms in a molecule?

Accepted Answer

The minimization of repulsions between electron pairs around a central atom.

Question 2

Which of the following molecules has a linear molecular geometry according to VSEPR theory?

Accepted Answer

$\mathrm{CO_2}$

Question 3

A molecule with the general formula $\mathrm{AB_3}$ and no lone pairs on the central atom will have which molecular geometry?

Accepted Answer

Trigonal planar

Question 4

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

Accepted Answer

$109.5^\circ$

Question 5

Which of the following best describes the molecular geometry of $\mathrm{NH_3}$ (ammonia)?

Accepted Answer

Trigonal pyramidal

Question 6

A molecule with four electron domains (two bonding and two nonbonding) around the central atom will have which molecular geometry?

Accepted Answer

Bent (angular)

Question 7

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

Accepted Answer

$\mathrm{XeF_4}$

Question 8

Given the molecule $\mathrm{ClF_4^-}$, how many bonding domains and nonbonding domains are present on the central atom, and what is its molecular geometry?

Accepted Answer

4 bonding, 2 nonbonding; square planar

Question 9

Which of the following best explains why $\mathrm{H_2O}$ has a bent molecular geometry rather than linear?

Accepted Answer

The two lone pairs on oxygen repel the bonding pairs, resulting in a bent shape.

Question 10

A molecule with the formula $\mathrm{AB_5}$ and no lone pairs on the central atom will have which molecular geometry?

Accepted Answer

Trigonal bipyramidal

Question 11

Which of the following molecules is expected to have a seesaw molecular geometry?

Accepted Answer

$\mathrm{SF_4}$

Question 12

What is the electron domain geometry and molecular geometry of $\mathrm{OF_2}$?

Accepted Answer

Electron domain geometry: tetrahedral; Molecular geometry: bent

Question 13

Which of the following statements about VSEPR theory is correct?

Accepted Answer

Lone pairs occupy more space than bonding pairs, affecting molecular geometry.

Question 14

A patient is exposed to $\mathrm{CO_2}$ gas. Based on its molecular geometry, what is the bond angle between the oxygen atoms?

Accepted Answer

$180^\circ$

Question 15

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

Accepted Answer

$\mathrm{PH_3}$

Question 16

A molecule has six electron domains around the central atom, with one lone pair. What is its molecular geometry?

Accepted Answer

Square pyramidal

Question 17

Which of the following best describes the geometry of $\mathrm{CF_4}$?

Accepted Answer

Tetrahedral

Question 18

A molecule with the formula $\mathrm{AB_2N_2}$ (where N represents a lone pair) and an octahedral electron domain geometry will have which molecular geometry?

Accepted Answer

Square planar

Question 19

Which of the following real-world compounds is an example of a molecule with a trigonal bipyramidal electron domain geometry?

Accepted Answer

$\mathrm{PCl_5}$

Question 20

A chemist is analyzing $\mathrm{ClF_4^-}$. What is the electron domain geometry and the molecular geometry of this ion?

Accepted Answer

Electron domain geometry: octahedral; Molecular geometry: square planar

Molecular Geometry and VSEPR Theory: A Study Guide

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