$$ \text{H}_2\text{O (s)} \rightarrow \text{H}_2\text{O (l)} $$

Question 1

Which of the following best describes a compound?

Accepted Answer

A substance composed of two or more elements chemically combined in a fixed ratio.

Question 2

Which of the following is an example of a homogeneous mixture?

Accepted Answer

Brass (an alloy of copper and zinc)

Question 3

Which process is an example of a chemical change?

Accepted Answer

Burning paper

Question 4

Which of the following statements about gases is correct?

Accepted Answer

Gases have an indefinite shape and volume.

Question 5

A student mixes copper metal with water in a beaker. Which type of mixture is formed?

Accepted Answer

Heterogeneous mixture

Question 6

Which of the following is a physical property of copper?

Accepted Answer

It is a good conductor of electricity.

Question 7

Which change of state occurs when dry ice (solid CO$$_2) $$turns directly into a gas?

Accepted Answer

Sublimation

Question 8

Which of the following best describes the particles in a solid?

Accepted Answer

Particles are close together and vibrate in fixed positions.

Question 9

Which of the following is NOT a physical change?

Accepted Answer

Rusting of iron

Question 10

A sample of air is best classified as:

Accepted Answer

A homogeneous mixture

Question 11

Which of the following processes is exothermic?

Accepted Answer

Condensation of steam

Question 12

Which of the following is a chemical property?

Accepted Answer

Ability to burn in oxygen

Question 13

Which of the following best describes the process of boiling?

Accepted Answer

A liquid changes to a gas throughout the entire liquid at its boiling point.

Question 14

Which of the following is an example of a pure substance?

Accepted Answer

Aluminum foil

Question 15

Which equation correctly represents the energy change for the melting of ice at 0 $$^\circC$$?

Accepted Answer

$$ 	ext{H}_2	ext{O (s)} ightarrow 	ext{H}_2	ext{O (l)} $$

Question 16

Which of the following is a correct statement about mixtures?

Accepted Answer

Mixtures can be separated by physical methods.

Question 17

A silver knife tarnishes when exposed to air. This is an example of:

Accepted Answer

A chemical property

Question 18

Which of the following best describes the process of deposition?

Accepted Answer

A gas changes directly to a solid.

Question 19

Which of the following is true about the boiling and condensation points of water?

Accepted Answer

Boiling and condensation occur at the same temperature.

Question 20

Which of the following is an example of a heterogeneous mixture?

Accepted Answer

Water and copper

Matter and Energy: Classification, Properties, and Changes

Study Guide - Practice Questions