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Chapter 4.2
Test Description: Compounds
Instructions: Answer all questions to get your test result.
1) Which of the following is NOT true about compounds?
A
Compounds join in specific ratios according to their masses.
B
Compounds are random combinations of elements.
C
The mass ratio of a specific compound is always the same.
D
Different mass ratios mean different compounds.
2) Which of the following statements is true about the properties of compounds?
A
A compound has the same properties as the elements that form it.
B
Compounds cannot be identified by their chemical properties.
C
A property of all compounds is to react with acid.
D
Each compound has its own physical properties.
3) The only way to break down a compound is through a(n)
A
physical change
B
chemical change
4) What compound is used by plants in photosynthesis to make carbohydrates?
A
carbon dioxide
B
hydrogen
C
nitrogen
D
ammonia
5) The elements in a compound
A
combine by reacting with one another.
B
All of the above
C
can be separated by chemical changes.
D
join in a specific ratio according to their masses.
6) When two or more elements join together chemically
A
the physical properties of the substances remain the same.
B
a mixture is formed.
C
a compound is formed.
D
a substance that is the same as the elements is formed.
7) The physical properties of compounds do NOT include
A
density
B
melting point
C
reaction to light
D
color
8) Which of the following will NOT break down compounds?
A
a chemical change
B
electric current
C
filtering
D
heat
9) How do elements join to form compounds?
A
in a specific mass ratio
B
randomly
C
in a ratio of 1 to 8
D
as the scientist plans it
10) What compound helps give carbonated beverages their “fizz”?
A
carbonic acid
B
carbon
C
hydrogen
D
oxygen
*select an answer for all questions
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