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Chemical Reactions
Test Description: Reactions
Instructions: Answer all questions to get your test result.
1) A reaction in which atoms of an element replace the atoms of a second element in a compound.
A
Combustion
B
Single Replacement
C
Double Replacement
D
Synthesis
2) A new substance formed in a chemical reaction
A
Reactant
B
Heat
C
Product
D
Catalyst
3) A starting substance in a chemical reaction
A
Reactant
B
Heat
C
Product
D
Catalyst
4) A reaction that involves an exchange of positive ions between two compounds.
A
Single Replacement
B
Double Replacement
C
Synthesis
D
Decomposition
5) An equation in which each side has the same number of atoms of each element
A
Balanced Equation
B
Catalyst
C
Product
D
Heat
6) A reaction in which two or more substances react to form a single substance.
A
Synthesis
B
Double Replacement
C
Decompostion
D
Single Replacement
7) A reaction in which an element or compound reacts with oxygen, often producing energy in the form of light.
A
Single Replacement
B
Combustion
C
Double Replacement
D
Synthesis
8) A reaction in which a single compound is broken down into two or more products.
A
Synthesis
B
Single Replacement
C
Combustion
D
Decomposition
9) A substance that speeds up a reaction without being used up.
A
Product
B
Heat
C
Catalyst
D
Reactant
10) What does the triangle symbol in a chemical equation mean?
A
Heat is supplied to the reaction.
B
yields
C
precipitate
D
A catalyst is needed.
11) Symbols used in equations, together with the explanations of the symbols, are shown below. Which set is correct?
A
(l), liters
B
(s), solid product
C
(g), grams
D
(aq), dissolved in water
12) What are the coefficients that will balance the skeleton equation below? AlCl + NaOH = Al(OH) NaCl
A
hydrogen
B
oxygen
C
carbon dioxide
D
water
13) In a combustion reaction, one of the reactants is ____.
A
3, 1, 3, 1
B
1, 3, 3, 1
C
1, 3, 1, 3
D
1, 1, 1, 3
14) Chemical equations must be balanced to satisfy ____.
A
Avogadro’s principle
B
the law of multiple proportions
C
the law of definite proportions
D
the law of conservation of mass
15) Chemical reactions ____.
A
only occur outside living organisms
B
occur only in living organisms
C
create and destroy atoms
D
produce new substances
*select an answer for all questions
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