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Questions and Answers
Which of the following best defines combustion?
Which of the following best defines combustion?
- The conversion of substances into solid state in the presence of oxygen
- The process of freezing substances in the presence of oxygen
- The reaction where substances give off heat and light in the presence of oxygen (correct)
- The process of boiling substances in the presence of oxygen
What distinguishes combustible substances from non-combustible substances?
What distinguishes combustible substances from non-combustible substances?
- Capability to catch fire and burn (correct)
- Density of the substances
- Color of the substances
- Ability to conduct electricity
Why is it more difficult to burn some combustible substances than others?
Why is it more difficult to burn some combustible substances than others?
- They have a higher boiling point
- They are denser in nature
- They are transparent to light
- They have a lower ignition temperature (correct)
What are the conditions required for combustion of a fuel?
What are the conditions required for combustion of a fuel?
Why is more care needed to store kerosene than coal, though both are fuels?
Why is more care needed to store kerosene than coal, though both are fuels?
The ______ of substances in the presence of oxygen gives off heat and light, which is known as combustion
The ______ of substances in the presence of oxygen gives off heat and light, which is known as combustion
Distinguish between ______ and non-combustible substances, giving three examples of each.
Distinguish between ______ and non-combustible substances, giving three examples of each.
It is more difficult to ______ some combustible substances than others because different substances catch fire at different temperatures.
It is more difficult to ______ some combustible substances than others because different substances catch fire at different temperatures.
State the conditions under which ______ occurs.
State the conditions under which ______ occurs.
Why is more care needed to store kerosene than coal, though both are ______.
Why is more care needed to store kerosene than coal, though both are ______.
Why is more care needed to store kerosene than coal, though both are fuels?
Why is more care needed to store kerosene than coal, though both are fuels?
What is combustion?
What is combustion?
Distinguish between combustible and non-combustible substances, giving three examples of each.
Distinguish between combustible and non-combustible substances, giving three examples of each.
Why is it more difficult to burn some combustible substances than others?
Why is it more difficult to burn some combustible substances than others?
State the conditions under which combustion occurs.
State the conditions under which combustion occurs.
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