
Chemical Reactions Exercises
Authored by EDGAR DAQUIOAG
Chemistry
10th Grade
Used 1+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following materials undergoes a chemical change?
Cutting of stainless metal plates
Crushing chunks of ice
Dissolving sugar in water
Rotting of tomatoes
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What are the substances that are present before a chemical reaction occurs?
Coefficients
Products
Reactants
Subscripts
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which symbol in a chemical equation represents "yields" or "produces"?
+
→
=
↑
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT an evidence of a chemical reaction?
Change in temperature
Evolution of gas
Melting of ice
Formation of precipitate
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What law states that matter cannot be created nor destroyed in a chemical reaction?
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions
Law of Chemical Change
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to the mass of reactants and products in a chemical reaction?
The mass of products is greater.
The mass of reactants is greater.
They must be equal.
There is no relationship.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when quicklime (CaO) is mixed with water?
Change in temperature
Formation of bubbles
Evolution of light
Production of mechanical energy
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