Question 1

Which of the following is a distinguishing property of a substance compared to a mixture?

Accepted Answer

It has a consistent composition throughout.

Answer

It can combine different types of matter.

Answer

Its properties change depending on the amount present.

Answer

It can be separated into smaller parts.

Question 2

Why can salt water be considered a mixture rather than a substance?

Accepted Answer

Because its components, salt and water, can be separated by physical means.

Answer

Because it cannot change its state of matter.

Answer

Because it is a liquid.

Answer

Because it contains more than one atom.

Question 3

Which property could help to identify a substance from a mixture?

Accepted Answer

Fixed melting point or boiling point

Answer

Different properties throughout

Answer

Possible to separate through physical methods

Answer

Variable composition

Question 4

Which of the following is not true about a pure substance?

Accepted Answer

It can be separated into simpler substances by physical methods.

Answer

It has fixed physical and chemical properties.

Answer

It is composed of identical particles.

Answer

It cannot be separated into simpler substances by physical methods.

Question 5

Which of the following can be considered a distinguishing characteristic of a mixture?

Accepted Answer

It can be separated into its components by physical methods.

Answer

It has fixed boiling and melting points.

Answer

It cannot be decomposed by chemical means.

Answer

It consists of only one kind of atom.

Question 6

Which of the following is more likely to be a mixture rather than a pure substance?

Accepted Answer

A drink with ice cubes

Answer

Pure ethanol

Answer

Distilled water

Answer

Solid gold bar

Question 7

What is one main difference between a mixture and a substance?

Accepted Answer

Mixtures can vary in composition, while substances cannot.

Answer

Mixtures can only be liquids, while substances can't be.

Answer

Mixtures are always solids, while substances are not.

Answer

Substances can be separated into different components, not mixtures.

Question 8

What distinguishes a homogeneous mixture from a pure substance?

Accepted Answer

A homogeneous mixture contains two or more substances that are uniformly mixed.

Answer

A pure substance contains two or more substances that are uniformly mixed.

Answer

A homogeneous mixture can't be separated into different components.

Answer

A homogeneous mixture has a fixed melting point.

Question 9

What feature of a mixture distinguishes it from a substance?

Accepted Answer

Variation in composition

Answer

Uniform properties throughout

Answer

Fixed boiling point

Answer

Cannot be separated by physical methods

Question 10

Which of the following materials is a pure substance?

Accepted Answer

Iron

Answer

Beach sand

Answer

Air

Answer

Mineral water

Related quizzes

Related quizzes