Chemical and Physical Properties of Substances

What is a property in chemistry?

• A substance's ability to react with other substances.

• A characteristic used to describe a substance.

• The process of changing a substance's chemical composition.

• The amount of matter in a substance.

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

• It forms rust when combined with oxygen.

• It has a silver-grey color.

• It creates hydrogen gas when mixed with acid.

• It combines with other substances.

Why is iron forming rust when it combines with oxygen considered a chemical property?

• Because it changes the color of the iron.

• Because it involves a change in the physical state of the iron.

• Because a new substance with a different chemical formula is formed.

• Because it only happens in the presence of air.

What indicates that mixing iron and acid to create hydrogen gas is a chemical property?

• The iron changes its shape.

• A new substance (hydrogen gas) is created.

• The acid changes its temperature.

• The iron becomes more dense.

Which statement best describes a physical property?

• A characteristic that describes how a substance reacts with other substances.

• A characteristic that involves the formation of a new substance.

• A characteristic that does not involve a substance acting in a chemical reaction.

• A characteristic that can only be observed by destroying the substance.

Which of the following describes a physical property of iron?

• It forms rust when exposed to air.

• It reacts with acid to produce hydrogen gas.

• It has a silver-grey color.

• It changes into a new substance when heated.

What type of property is described when copper reacts with oxygen in the air to form verdigris?

• Physical property, because it only changes color.

• Physical property, because no new substance is formed.

• Chemical property, because a new substance (verdigris) is formed.

• Chemical property, because it involves a change in state.

Which statement describes a physical property?

• Water breaks down into hydrogen and oxygen when electricity passes through it.

• Ethanol burns easily in the presence of oxygen.

• A solution of sodium chloride has a volume of 50 mL.

• Copper reacts with oxygen to form a greenish coating.

Why is flammability considered a chemical property?

• It describes how easily a substance changes shape.

• It involves a substance combining with another to create new substances.

• It indicates the substance's color or odor.

• It shows how much space the substance occupies.

Which of the following is a chemical property of sulfur?

• It is pale-yellow in color.

• It does not have a detectable odor.

• Solid sulfur is brittle.

• It combusts in oxygen gas to create SO3.