Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements that are chemically bonded together.

Question 2

Which of the following is a correct classification for air?

Accepted Answer

Homogeneous mixture

Question 3

Which statement about compounds is correct?

Accepted Answer

Compounds can only be broken down by chemical means.

Question 4

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Coffee

Question 5

Which of the following substances is a pure element?

Accepted Answer

Gold bar

Question 6

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

Accepted Answer

It has a fixed, definite composition.

Question 7

Which of the following is a heterogeneous mixture?

Accepted Answer

Salsa

Question 8

Which of the following is a compound?

Accepted Answer

Ammonia, $$NH_3$$

Question 9

Which of the following is a correct classification for saline solution?

Accepted Answer

Homogeneous mixture

Question 10

A student is given a sample of blood and asked to classify it. Which is the best classification?

Accepted Answer

Heterogeneous mixture

Question 11

Which of the following is a property of a pure substance?

Accepted Answer

It has a uniform and definite composition.

Question 12

Which of the following is an example of a homogeneous mixture used in medical settings?

Accepted Answer

Saline solution

Question 13

Which of the following is a correct statement about elements?

Accepted Answer

Elements are the simplest type of matter and cannot be broken down by chemical means.

Question 14

Which of the following is a real-world example of a heterogeneous mixture?

Accepted Answer

Trail mix

Question 15

Which of the following best describes the difference between a compound and a mixture?

Accepted Answer

A compound has elements chemically combined in fixed ratios, while a mixture has substances physically combined in variable ratios.

Question 16

Which of the following is a correct classification for Gatorade?

Accepted Answer

Homogeneous mixture

Question 17

Which of the following is NOT a pure substance?

Accepted Answer

Orange juice

Question 18

Which of the following is a correct classification for seawater?

Accepted Answer

Homogeneous mixture

Question 19

Which of the following is a correct classification for crystalline sugar?

Accepted Answer

Pure substance (compound)

Question 20

Which of the following best describes the basic functional unit of chemistry?

Accepted Answer

The atom

Classification of Matter: Concepts and Practice Questions

Study Guide - Practice Questions