Chemical Reactions
Chemistry
8th Grade
NGSS covered
Used 7+ times
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60 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not a sign of a chemical reaction?
change of energy or heat
color change
formation of a precipitate
change of mass
change of smell
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many Carbons are in the following formula? CaCO3
3
2
1
0
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a balanced equation?
Na + Cl2--> NaCl
C + O2 --> CO
2H2O--> 2H2 + O2
NaOH + 2HCl --> NaCl + H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a decomposition equation?
Na + Cl2--> NaCl
C + O2 --> CO
2H2O--> 2H2 + O2
NaOH + 2HCl --> NaCl + H2O
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a double replacement equation?
Na + Cl2--> NaCl
C + O2 --> CO
2H2O--> 2H2 + O2
NaOH + HCl --> NaCl + H2O
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a single replacement equation?
Na + Cl2--> NaCl
NaBr + Cl2 --> NaCl + Br2
2H2O--> 2H2 + O2
NaOH + HCl --> NaCl + H2O
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For a process to be defined as a chemical reaction, _____ must be produced.
a new substance
the same substance
light
more mass
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