What is a key difference between a chemical reaction and a physical change?

Chemical Reactions and Their Indicators in Everyday Life

Interactive Video
•
Chemistry, Science, Biology
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Physical changes are irreversible.
Chemical reactions involve the rearrangement of atoms.
Chemical reactions do not involve energy changes.
Physical changes create new substances.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT an indicator of a chemical reaction?
Dissolving sugar in water
Change in temperature
Formation of a precipitate
Color change
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the general form of a single displacement reaction?
A + BC → AC + B
AB → A + B
AB + CD → AD + CB
A + B → AB
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a single displacement reaction involving copper and silver nitrate, what is observed?
Silver precipitate forms and the solution turns blue.
The solution turns red.
Gas bubbles are produced.
The temperature decreases.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens during a double displacement reaction?
A compound breaks down into simpler substances.
Cations and anions of two compounds exchange places.
An element replaces another in a compound.
Two elements combine to form a compound.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a special case of a double displacement reaction?
Decomposition reaction
Combustion reaction
Synthesis reaction
Acid-base reaction
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the general form of a synthesis reaction?
A + B → AB
AB + CD → AD + CB
A + BC → AC + B
AB → A + B
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