Mixtures I

Which of the following statement is CORRECT?

I. Pure substance is a substance that is made up of only one kind of particle and have a fixed structure.

II. Compound is considered a pure substance consisting of two or more atoms that are chemically bonded to one another.

• I

• II

• Both I and II

• Neither I nor II

The following can be separated EXCEPT:

• Element

• Mixture

• Compound

• Element, Mixture, and Compound

Answer explanation

Pure substances, elements, and compound cannot be separated physically.

Compound cannot be separated physically even though it is made up of two or more atoms that are chemically bonded together.

Compound can only be separated by destroying the compound by chemical means

The following statements are correct EXCEPT:

I. Metalloids are combination of metal and non-metal elements

II. Non-metals are elements that can be considered poor conductors or unable to conduct energy.

III. Carbon, Nitrogen, Phosphorous, and Selenium are metallic elements.

IV. Metals are good conductor of heat and electricity.

• I

• II

• III

• IV

Which of the following statement is CORRECT about Compounds?

I. Compounds can be either acid or base.

II. Compounds are composed of two or more elements.

III. Compounds are pure substances.

• I

• II

• III

• I, II, and III

It is a mixture that is not uniform, and each form can be noticed and differentiated.

Anna wants to dissolve a substance in water. Which substance will dissolve the easiest?

• Rocks

• Sugar

• Pepper

• Sand

What mixture could you use this tool to best separate that mixture?

• Sugar and Salt

• Sand and rocks

• Apples and grapes

• Vinegar and Soy Sauce

Sand and clay is an example of a mixture of solids.

• True
• False

The best way to separate trail mix would be:

• filter

• by hand

• sieve

• evaporation

Sand and gravel may be separated from each other using this method.

• Using a filter funnel

• Using a sieve

• Using an evaporating basin

• Distillation