Chemical and Nuclear Reactions Review
Quiz
•
Science
•
6th - 12th Grade
•
Practice Problem
•
Medium
+6
Standards-aligned
Used 187+ times
FREE Resource
23 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be
balanced.
unbalanced.
an incomplete reaction.
a replacement reaction.
Tags
NGSS.MS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a chemical equation, numbers often appear in front of a chemical formula. These numbers tell you the
number of atoms in each molecule in the reaction.
number of elements in the reaction.
number of molecules or atoms of each substance in the reaction.
number of molecules in each atom in the reaction.
Tags
NGSS.MS-PS1-1
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
This is an unbalanced equation representing a chemical reaction: HgO --> Hg + O2
Which equation below is the correctly balanced chemical equation for this reaction?
HgO --> Hg + 2O2
2HgO --> Hg + O2
2HgO --> 2Hg + O2
2HgO --> Hg + 2O2
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a balanced chemical equation?
H2O2 --> H2O + O2
2 Fe2O3 + 3 C --> 4 Fe + 3 CO2
SO2 + O2 + 2 H2O --> 4 H2SO4
2 Mg + HC1 --> MgCl2 + H2
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In chemical reactions, what does the principle of conservation of mass mean?
The total mass of the reactants is equal to the total mass of the products.
The total mass of the reactants is greater than the total mass of the products.
The total mass of the reactants is less than the total mass of the products.
Matter is not changed.
Tags
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of a
synthesis reaction.
decomposition reaction.
replacement reaction.
precipitate reaction.
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When one element replaces another element in a compound, the reaction is a ____ reaction.
composition
decomposition
single replacement
double replacement
Tags
NGSS.MS-PS1-2
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