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Chemical Reactions 7
Test Description: Grade seven : Chemical Reactions
Instructions: Answer all questions to get your test result.
1) Burning of food is:
A
All of the choices.
B
Energy producer.
C
A chemical change.
D
An exothermic reaction
2) Breaking Glass is:
A
Both physical change and chemical change.
B
None of the choices.
C
A chemical Change.
D
A physical Change.
3) Chemical reactions are accompanied by energy in the form of:
A
Heat or thermal energy
B
Electrical energy.
C
All of the choices.
D
Light.
4) In a chemical reactions:
A
Matter is created and destroyed
B
Matter is conserved.
C
Matter is gained.
D
Matter is lost.
5) Complete combustion is:
A
A reaction with enough oxygen.
B
A reaction that produces water vapor and carbon dioxide.
C
An exothermic reaction.
D
All of the choices.
6) Gasoline is a combustible material found in:
A
Liquified gas.
B
Solid state.
C
Liquid state.
D
None of the choices.
7) Nitrogen and oxygen are:
A
None of the choices.
B
Two products of combustion reactions.
C
Two air pollutants.
D
Two air constituents.
8) Carbon monoxide is known as the silent killer because it is:
A
Odorless.
B
Colorless.
C
All of the choices.
D
Tasteless.
9) The incomplete combustion of a hydrocarbon produces:
A
Oxygen, water vapor and energy.
B
Oxygen, water vapor and energy.
C
Carbon dioxide, water vapor and energy.
D
Carbon monoxide, Carbon dioxide, water vapor and energy
10) Butane gas is:
A
None of the choices.
B
An air pollutant.
C
A combusting agents.
D
A combustible material.
*select an answer for all questions
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