Chemical Reactions
Authored by Ms. Engleman
Chemistry
6th - 8th Grade
NGSS covered
Used 260+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identify: Which is a sign of a chemical reaction?
Chemical properties change.
Physical properties change.
A gas forms.
A solid forms.
Tags
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Analyze: Using the periodic table, what atoms are present in the following chemical reaction?
CO2+NaOH→NaHCO3
sodium, oxygen, hydrogen, cobalt
sodium, oxygen, hydrogen, carbon
nitrogen, hydrogen, oxygen, cobalt
nitrogen, hydrogen, oxygen, carbon
Tags
NGSS.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the chemical equation HCl(acid)+NaOH(base)→H2O+NaCl, what atoms are present and what is produced by the reaction?
Atoms of hydrogen, chlorine, sodium, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because they neutralize the properties of each other.
Atoms of hydrogen, chlorine, nitrogen, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because they neutralize the properties of each other.
Atoms of hydrogen, chlorine, sodium, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because the properties of the acid take over.
Atoms of hydrogen, chlorine, sodium, and oxygen are present. When HCl and NaOH are combined they produce water and salt. This is because the properties of the base take over.
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Relate: Examine the chemical equation for photosynthesis. Which statement correctly describes how mass is conserved during this chemical reaction?
6CO2+6H2O→C6H12O6+6O2
carbon dioxide + water → sugar + oxygen gas
Atoms disappear, causing the mass of the products to be less than the mass of the reactants.
The atoms rearrange, causing the mass of the products to equal the mass of the reactants.
The atoms change into new atoms, causing the mass of the products to equal the mass of the reactants.
No changes occur, causing the mass of the products to equal the mass of the reactants.
Tags
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Two solutions are mixed and react to produce AgCl. The chemical reaction is shown by the balanced equation.
AgNO3+LiCl→AgCl+LiNO3
What happens to the total mass as the reaction takes place?
The mass increased.
The mass decreased.
The mass stayed the same.
The mass first increased and then decreased.
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What atoms are involved in this chemical reaction?
CaCO3→CaO+CO2
calcium, cobalt, and oxygen
calcium, carbon, and oxygen
calcium, carbon, and cobalt
carbon and oxygen
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a Reactant?
The end result of a chemical reaction.
The arrow that separates the product from the reactant.
The number to the lower right of an element that shows the number of atoms.
The substance changed in a chemical reaction.
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