Separation Techniques Quiz

What is a mixture?

• A substance made up of two or more pure substances

• A chemically bonded compound

• A substance with particles of different sizes

• A substance with particles of the same size

A homogenous mixture is....

• A mixture of different substances
• A mixture of similar substances
• A mixture that is uniform in composition
• A mixture that is not uniform in composition

A heterogenous mixture is...

• A mixture that has a uniform composition
• A mixture that has a non-uniform composition
• A mixture that only contains one type of particle
• A mixture that cannot be separated into its components

What is the difference between a compound and a mixture?

• Compounds cannot be physically separated, while mixtures can be

• Compounds have particles of different sizes, while mixtures have particles of the same size

• Compounds are made up of two or more pure substances, while mixtures are not

• Compounds have a higher density than mixtures

How can the size of particles be useful for separating mixtures?

• The size of particles can be used to separate mixtures through filtration, where larger particles are trapped while smaller ones pass through
• The size of particles is not useful for separating mixtures
• All particles are the same size, so they cannot be used to separate mixtures
• The size of particles can be used to separate mixtures through magnetism, where larger particles are attracted while smaller ones are not

What happens when an object with high density is mixed with something that has low density?

• The object with high density will float

• The object with high density will sink to the bottom

• The object with high density will evaporate

• The object with high density will dissolve

What is solubility?

• The temperature at which a substance changes from a solid to a liquid

• The temperature at which a liquid changes into a gas

• The term used to describe how easy it is for a substance to dissolve into a liquid

• The process of separating the clear liquid obtained after sedimentation

Which of the following materials is insoluble?

• Salt

• Sugar

• Sand

• Water

What is the melting point of a substance?

• The temperature at which a substance changes from a solid to a liquid

• The temperature at which a liquid changes into a gas

• The term used to describe how easy it is for a substance to dissolve into a liquid

• The process of separating the clear liquid obtained after sedimentation

What is the boiling point of a substance?

• The temperature at which a substance changes from a solid to a liquid

• The temperature at which a liquid changes into a gas

• The term used to describe how easy it is for a substance to dissolve into a liquid

• The process of separating the clear liquid obtained after sedimentation