Unit 9 Test: Chemical Reactions
Authored by Tiffany Wojtas
Biology
10th Grade
NGSS covered
Used 1+ times
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33 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements is incorrect:
A. A combustion reaction is a reaction where diatomic oxygen is a product
B. When the combustion of a reactant that contains carbon occurs, carbon dioxide will be one of the products
C. When the combustion of a reactant that contains nitrogen occurs, diatomic nitrogen will be one of the products
D. A combustion reaction can easily be balanced by saving the oxygen’s for last
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The symbol (aq) in a chemical equation means:
A catalyst is needed
Yields
Heat is supplied to the reaction
The substance is liquid
The substance is dissolved in water
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The symbol Δ in a chemical equation means:
The substance is a liquid
Yields
A catalyst is needed
Precipitate is formed
Heat is supplied to the reaction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a double replacement reaction:
The reactants are usually an ionic and covalent compound
The two reactants are two ionic compounds
Energy and light is always produced
An element and a compound react
None of these
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In order for the reaction Al + HCl → AlCl₃ + H₂ to occur, which of the following must be true:
Al must be above Cl on the activity series
Al must be above H on the activity series
Heat must be supplied to the reaction
AlCl₃ must be a precipitate
None of these
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The symbol ↔ indicates:
That heat must be applied
An incomplete combustion reaction
A gas is formed by the reaction
That the reaction is reversible
None of these
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For each of the following, convert the word equation into a formula equation, BUT do not balance! a) barium chlorate → barium chloride + oxygen
Ba(ClO3)2 → BaCl2 + O2
BaCl2 → Ba(ClO3)2 + O2
Ba(ClO3)2 + O2 → BaCl2
BaCl2 + O2 → Ba(ClO3)2
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