Question 1

Which of the following best describes a chemical property?

Accepted Answer

The ability of iron to rust when exposed to oxygen

Question 2

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

Accepted Answer

Burning methane gas in air to produce carbon dioxide and water

Question 3

A student mixes two clear solutions and observes the formation of a solid precipitate. This observation is evidence of:

Accepted Answer

A chemical change

Question 4

Which of the following is a chemical property of hydrogen gas?

Accepted Answer

It reacts explosively with oxygen to form water

Question 5

Which of the following statements about the reaction $$2\ \mathrm{CH}_3\mathrm{OH}(g) + 3\ \mathrm{O}_2(g) \rightarrow 2\ \mathrm{CO}_2(g) + 4\ \mathrm{H}_2\mathrm{O}(g) is $$correct?

Accepted Answer

It demonstrates a chemical property of methanol because new substances are formed

Question 6

Which of the following is an intensive property?

Accepted Answer

Density

Question 7

A sample of gasoline is ignited and burns completely in air. Which of the following best describes what has occurred?

Accepted Answer

A chemical change, because new substances are produced

Question 8

Which of the following is NOT a chemical property?

Accepted Answer

The boiling point of ethanol is $$78.4\ ^\circ\mathrm{C}$$

Question 9

Which of the following best distinguishes a chemical property from a physical property?

Accepted Answer

A chemical property describes how a substance interacts with other substances to form new substances

Question 10

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

Accepted Answer

Ice melting to form liquid water

Question 11

Which of the following is an extensive property?

Accepted Answer

Mass

Question 12

A student measures the mass and volume of a metal sample and calculates its density. Which type of property is density?

Accepted Answer

Intensive property

Question 13

Which of the following best describes the difference between a physical and a chemical change?

Accepted Answer

A chemical change results in the formation of new substances, while a physical change does not

Question 14

Which of the following is a chemical property of water?

Accepted Answer

It decomposes into hydrogen and oxygen when an electric current is passed through it

Question 15

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

Accepted Answer

The melting point of sodium chloride is $$801\ ^\circ\mathrm{C}$$

Question 16

A chemist observes that a sample of magnesium metal reacts with hydrochloric acid to produce hydrogen gas. This observation is evidence of:

Accepted Answer

A chemical property of magnesium

Question 17

Which of the following is a correct statement about intensive and extensive properties?

Accepted Answer

Intensive properties do not depend on the amount of substance present

Question 18

A student heats a sample of copper(II) carbonate, which decomposes to form copper(II) oxide and carbon dioxide gas. Which of the following best describes this process?

Accepted Answer

A chemical change, because new substances are formed

Question 19

Which of the following is a chemical property of silver?

Accepted Answer

It tarnishes when exposed to air, forming silver sulfide

Question 20

Which of the following best describes the classification of matter?

Accepted Answer

Matter can be classified as elements, compounds, or mixtures based on composition

Chemical Properties and Classification of Matter: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard