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 stored in oil because it is one of the most reactive elements. What type of property is this?

Accepted Answer

Chemical property

Question 4

Which of the following mixtures is heterogeneous?

Accepted Answer

Dirt

Question 5

Which of the following best describes the process of sodium reacting with water to produce hydrogen gas and a water solution of sodium hydroxide?

Accepted Answer

Chemical change

Question 6

Which of the following substances is a compound?

Accepted Answer

Calcium carbonate

Question 7

A student mixes sand and salt together. Which type of mixture is formed?

Accepted Answer

Heterogeneous

Question 8

Which of the following statements about gases is correct?

Accepted Answer

Gases exert pressure on all walls of the container.

Question 9

Which of the following is a physical change?

Accepted Answer

Melting ice cubes.

Question 10

Which of the following best describes the energy change when you make a cup of coffee and let the hot mixture cool so you can drink it?

Accepted Answer

Exothermic

Question 11

Which of the following is a correct statement about metals?

Accepted Answer

Metals form salts with many other elements.

Question 12

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 13

Which of the following is a physical property?

Accepted Answer

Sodium has a metallic luster.

Question 14

Which of the following is a homogeneous mixture?

Accepted Answer

Brass

Question 15

Which of the following best describes the compressibility of gases?

Accepted Answer

Gases exhibit high compressibility.

Question 16

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

Accepted Answer

Sodium reacts with water to produce hydrogen gas.

Question 17

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

Accepted Answer

Physical change

Question 18

Which of the following is a correct statement about the states of matter?

Accepted Answer

Solids have a definite shape and volume.

Question 19

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

Accepted Answer

Endothermic

Question 20

Which of the following is a correct statement about mixtures?

Accepted Answer

A homogeneous mixture has uniform composition throughout.

States of Matter, Properties, and Energy in Chemistry: Study Notes

Guida di studio - Domande di pratica