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Combustion Reactions
Test Description: The aim of this game is to identify the conditions for combustion and its types.
Instructions: Answer all questions to get your test result.
1) A combustible material is any substance that has the ability to burn. Indicate which of the following is not a combustible material.
A
Cloth
B
Wood
C
Sand
D
Fuel
2) How does the quantity of oxygen vary during combustion?
A
The quantity of oxygen does not vary with time.
B
The quantity of oxygen decreases with time.
C
The quantity of oxygen increases with time.
D
The quantity of oxygen increases then decreases.
3) Any combustion needs the presence of
A
Oxygen gas.
B
Butane gas.
C
Hydrogen gas.
D
Carbon dioxide gas.
4) Combustion can occur without
A
flame.
B
Oxygen gas.
C
Combustible material.
D
Temperature greater than kindling temperature.
5) A combustible material burns when it reaches its kindling temperautre. The lower the kindling temperature of a substance, the ........ it starts to burn.
A
longer time
B
slower
C
more difficult
D
easier
6) The kindling temperature is the temperature at which a combustible material starts to:
A
boil.
B
evaporate.
C
burn.
D
melt.
7) Complete combustion occurs when
A
Insufficient quantity of oxygen is supplied.
B
Sufficient qunatity of oxygen gas is supplied.
C
Sufficient quantity of butane gas is supplied.
D
Insufficient quantity of butane gas is supplied.
8) The products of a combustion reaction differ whether the reaction is complete or incomplete. The products of a complete combustion reaction are:
A
Carbon and water vapor.
B
Carbon dioxide.
C
Carbon dioxide and water vapor.
D
Water vapor.
9) Propane burns with oxygen gas in the air to produce carbon dioxide and water vapor. The word equation for complete combustion can be written as:
A
Propane ----> carbon dioxide + water vapor.
B
Propane + oxygen gas ----> carbon + water vapor.
C
Propane ----> carbon dioxide + water vapor.
D
Propane + oxygen gas ----> carbon dioxide + water vapor.
10) Combustion reactions are major sources of energy. The energy released in combustion reactions is used for many purposes like:
A
Cooking food and heating homes.
B
Powering vehicles
C
Producing electricity.
D
All the suggested answers.
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