Pure and impure chemical substances

Does this shown an element, a mixture or a compound?

• Compound

• Mixture

• Element

Is water an element, compound or mixture?

• Compound

• Mixture

• Element

What is the name of the process that occurs when salt is added to water and then stirred until the solid is no longer visible?

• Filtration

• Evaporation

• Dissolving

Is air an element, compound or mixture?

• Element

• Compound

• Mixture

In what type of substance does diffusion take place most quickly?

• Solid

• Liquid

• Gas

In a solution of copper sulfate, what is the solvent?

• The water

• The copper sulfate

• The mixture

What name is given to a substance that contains two types of atom that are not chemically joined together?

• Element

• Compound

• Mixture

In a salt solution, what is the solute?

• The water

• The salty water

• The salt

What process allows you to smell freshly baked bread in a supermarket, even when you are far from the bakery aisle?

• Evaporation

• Diffusion

• Chromatography

What happens to the boiling point of water when salt is added to it?

• It no longer boils at exactly 100 degrees Celsius

• It boils at exactly 100 degrees Celsius

• It will never boil