
Exploring Chemical Reactions
Authored by Megersa Bayisa
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10th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a synthesis reaction?
A synthesis reaction is when a single substance breaks down into two or more products.
A synthesis reaction is a chemical reaction where two or more substances combine to form a single product.
A synthesis reaction is a process where substances are mixed without any chemical change.
A synthesis reaction involves the exchange of ions between two compounds.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Give an example of a decomposition reaction.
H2 + O2 -> H2O
CaCO3 -> CaO + CO2
C6H12O6 -> 2 C2H5OH + 2 CO2
NaCl -> Na + Cl2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What occurs during a single replacement reaction?
One element replaces another in a compound.
Elements combine to form a new compound.
A compound decomposes into its elements.
Two compounds exchange elements.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Describe a double replacement reaction.
A double replacement reaction involves the combination of two elements to form a single compound.
A double replacement reaction occurs when two gases react to produce a liquid.
A double replacement reaction is when one compound decomposes into two simpler substances.
A double replacement reaction is a chemical reaction where two compounds exchange ions to form two new compounds.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main characteristic of redox reactions?
The formation of new compounds.
The release of energy without electron transfer.
The change in temperature of the reaction mixture.
The transfer of electrons between species.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identify the products of the synthesis reaction between hydrogen and oxygen.
Water (H2O)
Carbon dioxide (CO2)
Hydrogen peroxide (H2O2)
Methane (CH4)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of reaction is represented by the equation AB → A + B?
Single replacement reaction
Decomposition reaction
Double replacement reaction
Synthesis reaction
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