Question 1

Which of the following molecules is nonpolar, despite containing polar bonds, due to its molecular geometry?

Accepted Answer

CO\_2

Question 2

A molecule has three electron groups around its central atom, one of which is a lone pair. What is the molecular geometry and approximate bond angle?

Accepted Answer

Bent, 120^\circ

Question 3

Which of the following statements about resonance structures is TRUE?

Accepted Answer

The true structure of a molecule with resonance is an average of all possible resonance forms.

Question 4

What is the hybridization of the central atom in BF\_3?

Accepted Answer

sp^2

Question 5

How many sigma ($\sigma$) and pi ($\pi$) bonds are present in a molecule of CO\_2?

Accepted Answer

2 $\sigma$, 2 $\pi$

Question 6

A gas sample exerts a pressure of 0.95 atm. What is this pressure in mmHg? (Use $1\ 	ext{atm} = 760\ 	ext{mmHg}$)

Accepted Answer

$722\ 	ext{mmHg}$

Question 7

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

Accepted Answer

NH\_3

Question 8

Which of the following best explains why H\_2O is a polar molecule?

Accepted Answer

It has polar bonds and a bent geometry, so the dipoles do not cancel.

Question 9

What is the electron geometry and hybridization of the central atom in SF\_6?

Accepted Answer

Octahedral, sp^3d^2

Question 10

Which molecule below exhibits resonance?

Accepted Answer

NO\_3^-

Question 11

A molecule has four electron groups: two bonding pairs and two lone pairs. What is its molecular geometry and an example of such a molecule?

Accepted Answer

Bent; H\_2O

Question 12

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

Accepted Answer

Electron geometry considers both bonding and lone pairs, while molecular geometry considers only bonding pairs.

Question 13

Which of the following molecules is expected to be nonpolar due to its symmetry, even though it contains polar bonds?

Accepted Answer

CH\_4

Question 14

How many electron groups are around the central atom in PCl\_5, and what is its electron geometry?

Accepted Answer

5 electron groups; trigonal bipyramidal

Question 15

Which of the following statements about gas properties is INCORRECT?

Accepted Answer

Gases have a fixed volume but no fixed shape.

Question 16

A molecule has a triple bond between two atoms. How many $\sigma$ and $\pi$ bonds are present in this bond?

Accepted Answer

1 $\sigma$, 2 $\pi$

Question 17

Which of the following best describes the hybridization of the central atom in CO\_2?

Accepted Answer

sp

Question 18

A student draws two valid Lewis structures for SO\_2, each with a different location for the double bond. What concept does this illustrate?

Accepted Answer

Resonance

Question 19

Which of the following is the correct pressure conversion for 101,325 Pa to atm? (Use $1\ 	ext{atm} = 101,325\ 	ext{Pa}$)

Accepted Answer

1 atm

Question 20

Which of the following best describes a sigma ($\sigma$) bond?

Accepted Answer

A bond formed by head-to-head overlap of atomic orbitals

General Chemistry Study Guide: Molecular Geometry, Bonding Theories, and Gas Properties

Study Guide - Practice Questions