Chemistry Semester A

An example of an extensive property of matter is

• temperature.

• pressure.

• mass.

• hardness.

Which of the following are considered physical properties of a substance?

• color and odor

• melting and boiling points

• malleability and hardness

• all of the choices

Which state of matter expands when heated and is easy to compress?

• gas

• liquid

• solid

• plasma

Which of the following is a physical change?

• corrosion

• explosion

• evaporation

• rotting of food

Which of the following CANNOT be classified as a substance?

• table salt

• air

• nitrogen

• gold

Which of the following is a heterogeneous mixture?

• air

• salt water

• steel

• soil

Which of the following is true about homogeneous mixtures?

• They are known as solutions.

• They consist of two or more phases.

• They have compositions that never vary.

• They are always liquids.

Which of the following is true about compounds?

• They can be physically separated into their component elements.

• They have compositions that vary.

• They are substances.

• They have properties similar to those of their component elements.

Which of the following materials is a substance?

• air

• gasoline

• stainless steel

• silver

What distinguishes a substance from a mixture?

• Substances are compounds, and mixtures are not.

• Mixtures are groupings of elements, and compounds are not.

• Samples of the same substance can have different intensive properties.

• Mixtures can be separated physically, while compounds cannot.