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