Question

The substance expected to have the highest ignition temperature out of the following is

• A. kerosene
• B. petrol
• C. coal
• D. alcohol

Answer 1

The correct option is C

coal

Explanation of the correct answer:

The correct answer is option C:

1. The temperature at which a material begins to burn is known as the ignition temperature.
2. To begin burning, coal needs a very high starting temperature.
3. At varying temperatures, different flammable materials ignite.
4. If a substance's temperature is below its ignition temperature, it cannot burn or catch fire.
5. Anthracite is the best grade of coal, with the shiniest surface and the highest calorific value, thanks to the highest carbon content and fewest impurities.
6. Coal has an igniting temperature of 580°C.

Explanation of the incorrect answers:

Option A:

1. Kerosene has an ignition temperature of 290°C.

Option B:

1. For gasoline, the ignition temperature is 400°C.

Option D:

1. Alcohol burns at a temperature of 365°C.