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Chapter 4.2 Review (7th)
Test Description: Compounds
Instructions: Answer all questions to get your test result.
1) A pure substance composed of two or more elements that are chemically combined
A
solution
B
compound
C
mixture
D
elements
2) A poisonous, greenish yellow gas
A
chlorine
B
sodium chlorate
C
methane
D
sodium
3) When two or more elements join together chemically
A
a substance that is the same as the elements is formed.
B
a compound is formed.
C
the physical properties of the substances remain the same.
D
a mixture is formed.
4) The elements in a compound
A
combine by reacting with one another.
B
join in a specific ratio according to their masses.
C
can be separated by chemical changes.
D
All of the above
5) Which of the following will NOT break down compounds?
A
filtering
B
a chemical change
C
electric current
D
heat
6) How do elements join to form compounds?
A
in a ratio of 1 to 8
B
in a specific ratio
C
randomly
D
as the scientist plans it
7) Which of the following statements is true about the properties of compounds?
A
Each compound has its own physical properties.
B
Compounds cannot be identified by their chemical properties.
C
A compound has the same properties as the elements that form it.
D
A property of all compounds is to react with acid.
8) Compounds cannot be broken down by any mean
A
true
B
false
9) compounds can be broken down only by chemical changes
A
true
B
false
10) heating can break down some compounds
A
true
B
false
*select an answer for all questions
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