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Chemical Reactions
Test Description: Middle School Science for Special Education
Instructions: Answer all questions to get your test result.
1) Which of the following is a chemical reaction?
A
making lemonade
B
cutting paper
C
making a cake
D
melting an ice cube
2) When substances undergo chemical changes, a chemical reaction occurs and new substances are formed.
A
False
B
True
3) In a chemical reaction, the starting substances on the left side of the equation is called
A
products
B
reactants
C
mixtures
D
atoms
4) In a chemical reaction, the ending substances on the right side of the equation is called
A
products
B
reactants
C
atoms
D
mixtures
5) Rust is a combination of what two elements
A
Carbon and Iron
B
Iron and Oxygen
C
Hydrogen and Oxygen
D
Nitrogen and Lithium
6) An example of a physical change is
A
frying an egg
B
chopping wood in half
C
photosynthesis
D
rust on a car
7) When a chemical reaction gives off heat after the reaction occurs, it is called
A
exothermic
B
endothermic
C
compound
D
mixture
8) Which of the following shows that you a chemical reaction occured
A
gas bubbles
B
temperature change
C
color change
D
all answers are correct
9) What coefficent can be added to this equation to balance it? __NO2 + Cl2 = 2ClO2 + N2
A
3
B
2
C
0
D
1
10) What coefficent can be added to this equation to balance it? 3. N2 + __H2 -----------→ 2NH3
A
3
B
4
C
1
D
2
*select an answer for all questions
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