Question 1

Which of the following best describes a molecule?

Accepted Answer

A substance composed of atoms joined together by chemical bonds

Question 2

Which of the following is an example of a compound?

Accepted Answer

NaCl

Question 3

A solution in which the solute cannot be seen by the naked eye and does not settle out is best described as:

Accepted Answer

A true solution

Question 4

Which of the following is NOT a characteristic of a solution?

Accepted Answer

Solute particles are visible to the naked eye

Question 5

Blood plasma is best classified as which type of mixture?

Accepted Answer

Colloid

Question 6

Which of the following equations correctly represents the formation of water from its elements?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 7

Which of the following is a property of a suspension?

Accepted Answer

Solute particles are visible and settle out over time

Question 8

Which of the following is a correct example of a colloid found in the human body?

Accepted Answer

Blood plasma

Question 9

A mixture of NaCl dissolved in water is best described as:

Accepted Answer

A solution

Question 10

Which of the following ions is commonly found dissolved in blood plasma?

Accepted Answer

Cl$$^-$$

Question 11

Which of the following best explains why NaCl is considered a compound?

Accepted Answer

It is composed of two different elements chemically bonded together

Question 12

Which of the following is a correct statement about molecules?

Accepted Answer

Molecules are formed when atoms are joined together by chemical bonds

Question 13

If a solution contains 0.9% NaCl by mass, what type of solution is this most likely to be in the human body?

Accepted Answer

Isotonic saline

Question 14

Which of the following is NOT a property of a compound?

Accepted Answer

Can be separated by physical means

Question 15

Which of the following best describes the difference between a solution and a colloid?

Accepted Answer

Colloids have larger particles that do not settle out, while solutions have particles at the molecular level

Question 16

Which of the following is a real-life example of a suspension in the human body?

Accepted Answer

Blood with red blood cells

Question 17

Which of the following best describes the process of dissociation in water?

Accepted Answer

NaCl separates into Na$$^+$$ and Cl$$^-$$ ions

Question 18

Which of the following is a correct example of a molecule that is NOT a compound?

Accepted Answer

O$$_2$$

Question 19

Which of the following best describes the role of chemical bonds in molecule formation?

Accepted Answer

Chemical bonds hold atoms together to form molecules

Question 20

A student mixes sand and water in a beaker. After a few minutes, the sand settles to the bottom. This mixture is best classified as:

Accepted Answer

A suspension

Fundamental Chemical Concepts in Anatomy & Physiology

Study Guide - Practice Questions