Light, Combustion & Flame

What are the different types of combustion?

• controlled combustion

• rapid combustion

• complete combustion, incomplete combustion, spontaneous combustion

• spontaneous ignition

Explain the chemical changes that occur during combustion.

• During combustion, fuel molecules are converted into nitrogen gas and oxygen.

• The chemical changes in combustion result in the formation of sulfuric acid and nitrogen oxides.

• The chemical changes that occur during combustion involve the oxidation of the fuel molecules to produce carbon dioxide, water, and heat.

• Combustion involves the reduction of fuel molecules to produce carbon dioxide and water.

What are the characteristics of a flame?

• Brightness, flavor, sound

• Taste, smell, touch

• Temperature, color, shape, and size

• Texture, sound, weight

List some safety measures to be followed during combustion.

• Ensure proper ventilation, keep flammable materials away, use appropriate fuel sources, have fire extinguishing equipment nearby, follow safety guidelines.

• Ignore safety guidelines

• Use water to put out fires

• Wear flammable clothing

What are the effects of incomplete combustion?

• Enhanced air quality

• Reduced emissions

• Increased efficiency

• Formation of harmful byproducts such as carbon monoxide, soot, and unburned hydrocarbons

Define complete combustion.

• A chemical reaction where a fuel burns in an excess of oxygen to produce carbon dioxide and water vapor.

• A reaction where a fuel burns to produce water vapor only

• A chemical reaction where a fuel burns without oxygen

• A process where a fuel produces only carbon dioxide

How does combustion differ from burning?

• Combustion is slower than burning.

• Combustion is a specific type of burning that is rapid and produces heat and light.

• Combustion is a type of freezing.

• Combustion does not produce heat or light.

Why is it important to have proper ventilation during combustion?

• To create a cozy atmosphere

• To ensure there is enough oxygen available for the combustion process and to prevent the production of harmful byproducts.

• To increase the combustion temperature

• To reduce the noise level

What role does oxygen play in combustion?

• Oxygen reduces the temperature required for combustion.

• Oxygen acts as the oxidizing agent in combustion.

• Oxygen absorbs heat in combustion.

• Oxygen acts as a catalyst in combustion.

How can we prevent the occurrence of incomplete combustion?

• Ensure proper air supply, maintain correct fuel-to-air ratio, use clean fuel, and properly maintain combustion equipment.

• Neglect combustion equipment maintenance

• Use dirty fuel

• Increase fuel-to-air ratio