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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
Different mass ratios mean different compounds.
B
Compounds join in specific ratios according to their masses.
C
Compounds are random combinations of elements.
D
The mass ratio of a specific compound is always the same.
2) Which of the following statements is true about the properties of compounds?
A
Compounds cannot be identified by their chemical properties.
B
Each compound has its own physical 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.
3) The only way to break down a compound is through a(n)
A
chemical change
B
physical change
4) What compound is used by plants in photosynthesis to make carbohydrates?
A
carbon dioxide
B
ammonia
C
nitrogen
D
hydrogen
5) The elements in a compound
A
join in a specific ratio according to their masses.
B
can be separated by chemical changes.
C
combine by reacting with one another.
D
All of the above
6) When two or more elements join together chemically
A
a mixture is formed.
B
the physical properties of the substances remain the same.
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
melting point
B
color
C
reaction to light
D
density
8) Which of the following will NOT break down compounds?
A
a chemical change
B
filtering
C
heat
D
electric current
9) How do elements join to form compounds?
A
randomly
B
in a specific mass ratio
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
oxygen
C
carbon
D
hydrogen
*select an answer for all questions
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