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 homogeneous mixture?

Accepted Answer

Soda

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 pure substance?

Accepted Answer

Crystalline sugar

Question 5

A student is given a sample of seawater (unfiltered). How should it be classified?

Accepted Answer

Heterogeneous mixture

Question 6

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

Accepted Answer

Composed of only one kind of atom

Question 7

Which of the following substances is best classified as an element?

Accepted Answer

Gold bar

Question 8

A cup of black coffee is best classified as:

Accepted Answer

Homogeneous mixture

Question 9

Which of the following is a correct classification for orange juice (with pulp)?

Accepted Answer

Heterogeneous mixture

Question 10

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

Accepted Answer

Air (well-mixed)

Question 11

Which of the following statements is FALSE?

Accepted Answer

Compounds can be separated into elements by physical means.

Question 12

A sample of wine is best classified as:

Accepted Answer

Homogeneous mixture

Question 13

Which of the following is a correct classification for ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

Compound

Question 14

Which of the following is a heterogeneous mixture?

Accepted Answer

Sand (unfiltered)

Question 15

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

Accepted Answer

Uniform and fixed composition

Question 16

A saline solution is best classified as:

Accepted Answer

Homogeneous mixture

Question 17

Which of the following is an example of a mixture that can be separated by filtration?

Accepted Answer

Sand and water

Question 18

Which of the following best explains why milk is considered a heterogeneous mixture?

Accepted Answer

It contains suspended fat globules that can separate over time.

Question 19

Which of the following is a correct statement about elements?

Accepted Answer

Elements are the simplest type of matter and consist of only one kind of atom.

Question 20

A student mixes sugar and water until the sugar dissolves completely. The resulting solution is best classified as:

Accepted Answer

Homogeneous mixture

General Chemistry: Classification of Matter – Guided Practice

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