E-C-M CMS 2021 Question Preview (ID: 55411)


Fodipi 2021. TEACHERS: click here for quick copy question ID numbers.

Which of the following are considered pure substances?
a) elements only
b) compounds only
c) neither elements nor compounds
d) both elements and compounds

The substance that dissolves to form a solution is the:
a) solute
b) solvent
c) suspension
d) surface area

Which of the following substances can be separated into simpler substances only by chemical means?
a) sodium
b) water
c) gold
d) saltwater

A(n) ____________________ can be separated by filtration.
a) colloid
b) compound
c) solution
d) suspension

Compounds are not random combinations of elements. They have a specific:
a) chemical ratio
b) color
c) location
d) valence number

Metals, nonmetals, and metalloids are physical properties of:
a) alloys
b) elements
c) solutions
d) suspensions

Which factor does not increase the speed at which a solid solute dissolves in water?
a) stirring or shaking the mixture
b) adding more solute
c) crushing the solute
d) heating the mixture

How is a mixture different from a compound?
a) Mixtures are commonly found in nature
b) Mixtures are rare
c) Each substance in a mixture keeps most of its physical properties
d) compounds are rare

A pure substance made of two or more elements that are chemically combined is called a:
a) compound
b) solution
c) suspension
d) mixture

Which of the following are NOT considered mixtures?
a) solutions
b) compounds
c) colloids
d) suspensions

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