Podcast
Questions and Answers
What substance does magnesium burn to produce during combustion?
What substance does magnesium burn to produce during combustion?
- Water vapor
- Oxygen
- Magnesium oxide (correct)
- Carbon dioxide (correct)
Charcoal does not burn in air.
Charcoal does not burn in air.
False (B)
What is a characteristic of a substance that acts as a fuel?
What is a characteristic of a substance that acts as a fuel?
It gives off heat during combustion.
During combustion, charcoal produces __________, heat, and light.
During combustion, charcoal produces __________, heat, and light.
Match the combustion reactions with their products:
Match the combustion reactions with their products:
Which material listed is not a combustible substance?
Which material listed is not a combustible substance?
Charcoal is an example of a combustible substance.
Charcoal is an example of a combustible substance.
What is the definition of combustion?
What is the definition of combustion?
___ is a fuel for our bodies.
___ is a fuel for our bodies.
Match the combustible substances with their state of matter:
Match the combustible substances with their state of matter:
What was used as matches in ancient Egypt over five thousand years ago?
What was used as matches in ancient Egypt over five thousand years ago?
Modern safety matches were developed over five hundred years ago.
Modern safety matches were developed over five hundred years ago.
What is the purpose of pouring water in one of the paper cups during the procedure?
What is the purpose of pouring water in one of the paper cups during the procedure?
What is the lowest temperature at which a substance catches fire called?
What is the lowest temperature at which a substance catches fire called?
The procedure requires using two different types of heating sources.
The procedure requires using two different types of heating sources.
A matchstick does not catch fire on its own at room temperature, but rubbing it on the side of the matchbox starts the burning process due to the matchbox's ability to raise the temperature of the tip of the matchstick beyond its __________.
A matchstick does not catch fire on its own at room temperature, but rubbing it on the side of the matchbox starts the burning process due to the matchbox's ability to raise the temperature of the tip of the matchstick beyond its __________.
What will likely happen to the paper cup containing water when heated with a candle?
What will likely happen to the paper cup containing water when heated with a candle?
Match the components used in the head of a modern match with their purposes:
Match the components used in the head of a modern match with their purposes:
When heating the cups, the one without water may _____ due to the high temperature.
When heating the cups, the one without water may _____ due to the high temperature.
Match the following steps to their expected observations:
Match the following steps to their expected observations:
Which of the following is considered an inflammable substance?
Which of the following is considered an inflammable substance?
It is unnecessary to memorize the telephone number of the fire service.
It is unnecessary to memorize the telephone number of the fire service.
What is the first action you should take if a fire breaks out in your home?
What is the first action you should take if a fire breaks out in your home?
Substances that can easily catch fire are known as ______ substances.
Substances that can easily catch fire are known as ______ substances.
Match each type of action to its fire control method:
Match each type of action to its fire control method:
What are the essential requirements for the production of fire?
What are the essential requirements for the production of fire?
Water can help prevent the spread of fire by cutting off the supply of oxygen.
Water can help prevent the spread of fire by cutting off the supply of oxygen.
What should you do immediately if a fire occurs at home?
What should you do immediately if a fire occurs at home?
One method to control fire is by removing the _____ supply.
One method to control fire is by removing the _____ supply.
Match the following fire control methods with their descriptions:
Match the following fire control methods with their descriptions:
What type of combustion occurs when a material suddenly ignites without an obvious external cause?
What type of combustion occurs when a material suddenly ignites without an obvious external cause?
Carbon dioxide (CO2) is recommended for extinguishing fires involving electrical equipment.
Carbon dioxide (CO2) is recommended for extinguishing fires involving electrical equipment.
What is the best method to extinguish a fire involving flammable materials?
What is the best method to extinguish a fire involving flammable materials?
In the case of incomplete combustion, carbon dioxide (CO2) is emitted instead of ________ or ________.
In the case of incomplete combustion, carbon dioxide (CO2) is emitted instead of ________ or ________.
Match the types of combustion with their descriptions:
Match the types of combustion with their descriptions:
What is one of the causes of forest fires?
What is one of the causes of forest fires?
Spontaneous combustion can occur in coal mines due to coal dust.
Spontaneous combustion can occur in coal mines due to coal dust.
What type of reaction occurs when a cracker is ignited during a festival?
What type of reaction occurs when a cracker is ignited during a festival?
The flame produced by burning magnesium ribbon is typically __________ in color.
The flame produced by burning magnesium ribbon is typically __________ in color.
Match the materials with the color of their flames:
Match the materials with the color of their flames:
What is spontaneous combustion?
What is spontaneous combustion?
Carbon dioxide can be used to extinguish fire by supplying oxygen to the flames.
Carbon dioxide can be used to extinguish fire by supplying oxygen to the flames.
Name one chemical that can be used in fire extinguishers.
Name one chemical that can be used in fire extinguishers.
Combustion is a process where a substance reacts with __________, producing heat and light.
Combustion is a process where a substance reacts with __________, producing heat and light.
Match the following types of combustion with their descriptions:
Match the following types of combustion with their descriptions:
What type of substances produce flames during combustion in the experiment?
What type of substances produce flames during combustion in the experiment?
Charcoal produces a flame when it is burned.
Charcoal produces a flame when it is burned.
What is observed when a wire is held inside the non-luminous portion of a flame?
What is observed when a wire is held inside the non-luminous portion of a flame?
Kerosene oil and molten wax produce flames by __________.
Kerosene oil and molten wax produce flames by __________.
Match the following substances with their combustion behavior:
Match the following substances with their combustion behavior:
Study Notes
Combustion
- Combustion is a chemical process where a substance reacts with oxygen, producing heat and light.
- A substance that undergoes combustion is combustible and also known as a fuel.
- Magnesium and charcoal are combustible substances
- Substances that catch fire easily due to low ignition temperatures are called inflammable substances.
- Examples of inflammable substances include petrol, alcohol, and Liquified Petroleum Gas (LPG).
- To control fire, remove one of the essential requirements: fuel, oxygen, or heat.
Controlling Fire
- Fire brigades use water to cool burning materials and prevent the spread of fire by cutting off the oxygen supply.
- Water vapor surrounds the combustible materials, further preventing their combustion.
- Avoid handling fire yourself. Seek help from the fire service.
Types of Combustion
- Complete combustion: The burning process where all fuel burns completely, producing only carbon dioxide and water.
- Incomplete combustion: The burning process where fuel burns partially, producing carbon dioxide, carbon monoxide, and other byproducts.
- Spontaneous combustion: The burning of a material without any evident external cause, such as heat or flame.
- Rapid Combustion: Combustion reaction that happens very quickly, producing heat and light, often leading to an explosion.
Fire Extinguishers
- Carbon dioxide (CO2) is a popular fire extinguisher as it acts as a blanket, cutting off the oxygen supply and cooling the fuel.
- Sodium bicarbonate and potassium bicarbonate are also used in fire extinguishers.
Spontaneous Combustion and Flames
- Spontaneous combustion of coal dust in mines can cause disastrous fires.
- Forest fires can be caused by sunlight, lightning, and human carelessness.
- Fireworks are a classic example of rapid combustion, producing heat, light, sound, and a large gas volume.
Flame Observation
- Experiment: Burning kerosene oil and wax vaporize and produce flames.
- Charcoal does not vaporize, therefore it does not produce a flame.
- The non-luminous zone of a candle flame contains unburnt carbonaceous particles.
- The non-luminous zone is cooler than the luminous zone.
Observation of Combustion
- The text describes an experiment related to the nature of flames and different behaviors of substances during combustion.
- It concludes that the presence of a blackened ring on a plate implies a deposition of unburned hydrocarbon materials, which are present in the non-luminous zone of the flame.
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Description
This quiz explores the fundamental concepts of combustion, including types of combustion and the characteristics of combustible and inflammable substances. It also covers essential fire control techniques used by fire brigades to manage and extinguish fires effectively.
