Question 1

Which of the following best describes a property of a solid?

Accepted Answer

Particles are arranged in a regular, fixed geometric pattern.

Question 2

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

Accepted Answer

Burning coal.

Question 3

Potassium is a solid at room temperature. This is an example of which type of property?

Accepted Answer

Physical property

Question 4

Which of the following mixtures is homogeneous?

Accepted Answer

Gasoline

Question 5

When sodium reacts with water to produce hydrogen gas and a watery solution of sodium hydroxide, what type of change is this?

Accepted Answer

Chemical change

Question 6

Which of the following best describes a gas?

Accepted Answer

Particles move independently of each other.

Question 7

Which of the following is a physical change?

Accepted Answer

Melting an ice cube.

Question 8

Which of the following substances is a compound?

Accepted Answer

Calcium carbonate

Question 9

Which of the following best describes an endothermic process?

Accepted Answer

Energy is absorbed from the surroundings.

Question 10

A student mixes salt and water and observes that the salt dissolves completely. Which of the following best describes the resulting mixture?

Accepted Answer

Homogeneous mixture

Question 11

Which of the following statements about physical and chemical properties is correct?

Accepted Answer

Physical properties can be observed without changing the substance's identity.

Question 12

Which of the following is a chemical property?

Accepted Answer

Reactivity with acid

Question 13

Which of the following best describes the energy change when ice melts?

Accepted Answer

Endothermic, because energy is absorbed from the surroundings.

Question 14

Which of the following is NOT a physical property?

Accepted Answer

Flammability

Question 15

A glass of water is left in the freezer and turns to ice. Which of the following best describes this process?

Accepted Answer

Physical change

Question 16

Which of the following best describes a heterogeneous mixture?

Accepted Answer

A mixture with visibly different parts or phases.

Question 17

Which of the following is an example of a physical property that can be used to separate a mixture?

Accepted Answer

Boiling point

Question 18

Which of the following best describes the process of burning coal?

Accepted Answer

Chemical change

Question 19

Which of the following is a correct statement about the compressibility of gases?

Accepted Answer

Gases exhibit high compressibility.

Question 20

Which of the following best explains why sodium metal must be stored under oil?

Accepted Answer

Sodium reacts violently with water and air.

Matter and Energy: States, Properties, Changes, and Mixtures

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