Elements, Compounds & Mixtures: Question Preview (ID: 6435)

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

How is a mixture different from a compound?
a) Mixtures have two or more components.
b) Solids, liquids, and gases can form mixtures.
c) Mixtures are commonly found in nature.
d) Each substance in a mixture keeps most of its characteristic properties.

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

Metals, nonmetals, and metalloids are characteristic properties of:
a) alloys
b) elements
c) substances
d) compounds

Compounds are not random combinations of elements. They have a specific:
a) density
b) concentration
c) chemical composition
d) mass ratio

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

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

The substance that dissolves to form a solution is the:
a) colloid
b) solvent
c) solute
d) alloy

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

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

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