COMBUSTION AND FLAME TEST 1 WITH AI

Identify the appropriate category in which combustion can be categorised

• Physical reactions
• Biological reactions
• Nuclear reactions
• Chemical reactions

Identify the correct option regarding the ignition temperature of an ideal fuel

• The ignition temperature of an ideal fuel is the maximum temperature at which the fuel ignites
• The ignition temperature of an ideal fuel is not affected by the surrounding environment
• The ignition temperature of an ideal fuel is higher in a vacuum compared to in air
• The correct option regarding the ignition temperature of an ideal fuel is that it is the minimum temperature at which the fuel spontaneously ignites in air without an external ignition source.

Smoke in a flame is due to the presence of carbon content in the fuel

• Carbon content in the fuel
• Smoke in a flame is due to the presence of hydrogen content in the fuel
• Smoke in a flame is due to the presence of oxygen content in the fuel
• Smoke in a flame is due to the presence of nitrogen content in the fuel

The suspended particles released by combustion of coal in air may lead to a healthy disease, select the correct option

• Cardiovascular diseases
• Respiratory diseases
• Skin diseases
• Muscular diseases

The usage of LPG in rural areas should be promoted because

• LPG is harmful to the environment
• LPG is more expensive than other fuels
• LPG is difficult to store and transport
• LPG is cleaner, more efficient, and convenient for cooking purposes.

White phosphorous burns in air spontaneously

• White phosphorous is a liquid at room temperature.
• White phosphorous is non-reactive in air.
• White phosphorous is used in fireworks.
• White phosphorous is highly reactive and its ignition temperature is 30 degree Centigrade

The colour of outer zone of a candle flame is

• green
• red
• yellow
• blue

Kerosene oil catches fire at room temperature

• Kerosene oil is a non-flammable liquid.
• Kerosene oil has a low flash point. and its ignition temperature if 60 degree Celntigrade

• Kerosene oil is safe to use near open flames.
• Kerosene oil is commonly used in extinguishing fires.

What is the main chemical component present in striking surface of a match box

• potassium

• Phosphorous

• potassium chlorate

• Graphite

Which of the following is not a component of a fire triangle

• Oxygen

• Fuel
• Heat

• Water