Question 1

Which of the following best describes a compound?

Accepted Answer

A substance made of two or more different elements bonded together.

Question 2

A student mixes salt and water in a beaker. Which statement best describes the resulting mixture?

Accepted Answer

It is a mixture because the components can be separated physically.

Question 3

Which of the following is an example of a physical change?

Accepted Answer

Melting ice into water.

Question 4

Which property is intensive and does NOT depend on the amount of substance present?

Accepted Answer

Density

Question 5

Which statement correctly distinguishes between an element and a compound?

Accepted Answer

Elements are made of one kind of atom, while compounds are made of two or more different elements bonded together.

Question 6

A sample of gold is cut in half. Which property remains unchanged?

Accepted Answer

Density

Question 7

Which of the following is NOT a pure substance?

Accepted Answer

Air

Question 8

Which process represents a chemical change?

Accepted Answer

Burning gasoline in a car engine.

Question 9

A student observes that the mass of a block of ice is 50 g and its volume is 55 mL. What is the density of the ice?

Accepted Answer

$$\dfrac{50\ \mathrm{g}}{55\ \mathrm{mL}} = 0.91\ \mathrm{g/mL}$$

Question 10

Which of the following best explains why burning wood is considered a chemical change?

Accepted Answer

New substances are formed with different properties.

Question 11

Which statement is true about mixtures?

Accepted Answer

Mixtures can be separated physically.

Question 12

A chemist wants to separate a mixture of sand and salt. Which method would be most effective?

Accepted Answer

Filtration followed by evaporation

Question 13

Which of the following is an example of an extensive property?

Accepted Answer

Mass

Question 14

Which statement about atoms is correct?

Accepted Answer

Atoms are the basic unit of matter.

Question 15

A student heats a sample of water and observes it boiling. What type of change is occurring?

Accepted Answer

Physical change

Question 16

Which of the following is a correct definition of matter?

Accepted Answer

Anything that has mass and takes up space.

Question 17

Which of the following is a chemical property?

Accepted Answer

Ability to react with oxygen

Question 18

A mixture of ethanol and water is separated by distillation. What property allows this separation?

Accepted Answer

Difference in boiling points

Question 19

Which of the following is true about pure substances?

Accepted Answer

They have a fixed composition.

Question 20

A student has a sample of copper metal. Which statement is true about this sample?

Accepted Answer

It is an element because it is made of only one kind of atom.

Introduction to Matter and Its Properties

Study Guide - Practice Questions