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Chemical Reactions And Equations
Test Description: Types of chemical reactions
Instructions: Answer all questions to get your test result.
1) A process in which one more mor substances change to make a new substance with new properties
A
Atom
B
Chemical Change
C
Element
D
Physical Change
2) What is an example of a chemical reaction
A
Ripping paper
B
Bending a paper clip
C
Breaking glass
D
Leaves changing colors in fall
3) What are signs that a chemical reaction has occurred
A
Gas bubbles
B
Precipitate
C
New substance with different properties
D
All of these
4) Type of reaction in which 2 or more elements combine to forma single more complex compound. A+B yield AB
A
Synthesis
B
Decomposition
C
Single replacement
D
Double replacement
5) Type of reaction in which a single compound breaks down into parts. AB yield A+B
A
Synthesis
B
Decomposition
C
Single replacement
D
double replacement
6) Type of reaction in one 1 element is being singled out/replaced AB + C yields AC + B
A
single replacement
B
double displacement
C
decomposition
D
synthesis
7) Type of reaction in which elements switch places. AB + CD yields AC + BD
A
single replacement
B
decomposition
C
double replacement
D
synthesis
8) Type of reaction in which energy is released
A
endothermic
B
exothermic
9) Type of reaction in which energy is taken in
A
endothermic
B
exothermic
10) Photosynthesis is what type of reaction?
A
endothermic
B
exothermic
11) Whats on the left side of the chemical equation
A
Yields
B
Reactants
C
Products
D
Subscript
12) Whats on the right side of a chemical equation?
A
Coefficient
B
Yields
C
Products
D
Reactants
13) What does the arrow mean in a chemical reaction?
A
The reaction stops
B
Nothing
C
Reactants
D
Yields
14) Hydrogen and oxygen reactants to form water. Whats the reactants?
A
Hydrogen and water
B
Hydrogen
C
Hydrogen and oxygen
D
Water
15) Hydrogen and oxygen reactants to form water. Whats the products?
A
oxygen
B
water
C
hydrogen
D
Hydrogen and oxygen
16) How many hydrogen atoms are in the following formula 2H2O
A
2
B
1
C
4
D
0
17) How many Carbon atoms are in the following formula: 3CH4
A
12
B
1
C
3
D
4
18) How do you know if a chemical equation obeys the Law of Conservation of Mass?
A
you dont
B
The mass of the reactants are greater than the products
C
It is balanced (mass of reactants = mass of products)
D
The mass of the products are greater
19) What does a subscript tell you?
A
Chemical symbol
B
How many of each atom is in the compound
C
How many compounds you have
D
Nothing
20) What is the big number placed in from the formula called?
A
coefficient
B
elemenr
C
subscript
D
compound
*select an answer for all questions
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