WorksheetsChemical Reactions Quiz-Reading Material
Total questions: 10
Worksheet time: 50mins
What is a chemical reaction?
A process in which matter disappears
A process in which atoms are destroyed
A process in which atoms are rearranged
A process in which new substances are formed
What is the Law of Conservation of Matter?
Matter cannot be created or destroyed, atoms can only rearrange themselves in a chemical reaction
The total number of atoms changes in a chemical reaction
Atoms can only rearrange themselves in a physical change
Matter can be created or destroyed in a chemical reaction
What is an example of a physical change?
Burning of wood
Melting of ice
Rusting of iron
Cooking an egg
What are the products of the chemical reaction: C3H8 (propane) + 5O2 ? 3CO2 + 4H2O?
C3H8 + 5O2
3CO2 + 4H2O
4CO2 + 3H2O
3CO2 + 5H2O
What happens to the total mass in a chemical reaction?
It decreases
It increases
It stays the same
It becomes zero
What are some properties of matter?
Magnetism, reactivity, weight, and color
Magnetism, flammability, density, and color
Magnetism, flammability, weight, and odor
Magnetism, reactivity, density, and odor
What is an example of a chemical reaction?
Dissolving salt in water
Melting of ice
Burning of wood
Boiling water
What is the result of a physical change?
Molecules interact with each other
Atoms rearrange themselves
Changes of state or phase changes
New substances are formed
What is the outcome of a chemical reaction?
Molecules interact with each other
Matter disappears
Atoms rearrange themselves
New substances are formed
What is the purpose of a catalyst in a chemical reaction?
To speed up the reaction without being used up
To decrease the total mass
To increase the total mass
To slow down the reaction without being used up
