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