______17.In a dispersion, which phases of matter will not form colloid? a.Liquid to liquid b.Liquid to solid c.Solid to gas d.Gas to Gas
______18.When sodium is combined with chlorine through a chemical process,what material will be formed? a.Fats b.Protein c.Rain d.Table salt
______ 19.Which of the following statements is true? a.A mixture is categorized as an element and a compound. b.A pure substance has a definite and constant composition. c.A mixture contains materials that are combined chemically. d.A pure substance is classified as homogeneous and heterogeneous.
________20.George noticed that the soil he will use for planting has other materials such as sand and dry leaves.What does this show? a.The soil is a compound b.The soil is a homogeneous mixture c.The soil is a heterogeneous mixture d.The soil is produced by elements that have chemically combined.
B.Write the term that is being described in each item. __________1.The simplest form of matter that cannot be broken down into a simpler substance. __________2.The part of a solution that dissolves the solute. __________3.The scattering and reflection of light caused by the colloid particles. __________4.Formed when hydrogen is combined with oxygen through a chemical reaction. __________5.What the appearance of the components of a solution look like. __________6.Has to be added to the mixture to make a diluted solution. __________7.A type of mixture with components that are evenly distributed. __________8.A type of air pollution produced by combining smoke and fog. __________9.A type of solution that contains a very small amount of solute in a greater amount of solvent. _________10.The solvent in a sugar solution.
D.Put a check (✅)on the blank if the statement is true.If false , replace it with the correct word or phrase to make the statement right.
_______1.A solution is a kind of heterogeneous mixture. _______2.There are five types of colloid; suspension,foam,sol,gel, and aerosol. _______3.If the solid material is dispersed in a liquid dispersing medium , it will form a/an aerosol. _______4.Smoke is an example of a solid aerosol. _______5.Emulsion is a combination of two liquids that are completely miscible. _______6.Marshmallow is an example of a solid foam. _______7.Blood is a homogeneous mixture. _______8.An element is a combination of two or more substances that are physically combined. _______9.When the solid particles are insoluble in liquid ,it forms a mixture called a suspension. ______10.Water is considered as a universal solvent.
