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 the energy change when you make a cup of coffee and let the hot water cool?

Accepted Answer

Exothermic

Question 10

Which of the following best describes a heterogeneous mixture?

Accepted Answer

Trail mix

Question 11

Which of the following is a physical property?

Accepted Answer

Sodium has a metallic luster.

Question 12

Which of the following best describes the process of dissolving salt in water?

Accepted Answer

Physical change

Question 13

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

Accepted Answer

Potassium is among the most reactive elements.

Question 14

Which of the following best describes the energy transformation when a cyclist pedals up a hill and then coasts down?

Accepted Answer

Kinetic energy is converted to potential energy going up, and potential energy is converted to kinetic energy going down.

Question 15

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

Accepted Answer

Gases exhibit high compressibility.

Question 16

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

Accepted Answer

Chemical change

Question 17

Which of the following is a homogeneous mixture?

Accepted Answer

Brass

Question 18

Which of the following best describes the process of melting ice?

Accepted Answer

Physical change

Question 19

Which of the following is a correct statement about the particles in a liquid?

Accepted Answer

Particles flow over each other while retaining a fixed volume.

Question 20

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

Accepted Answer

Chemical change

Matter and Energy: States, Properties, and Changes in GOB Chemistry

Guida di studio - Domande di pratica