Chapter 3: Combustion Of Fuels

Fill-in-the-blank flashcards covering key concepts from the lecture notes on combustion of fuels.

When a substance burns in air, it usually produces a flame. Heat is also evolved during the process. Such a process is called __.

combustion

Three conditions necessary for combustion are: (i) __ substance; (ii) supporter of combustion; (iii) ignition temperature.

Combustible

A substance which catches fire easily to produce heat energy is called a __.

combustible substance

Fuels may be solid, liquid, or __.

gas

All fuels such as petrol, kerosene, diesel, coal, wood, LPG, CNG, etc., are __ substances.

combustible

A substance which does not burn in the presence of air is called a __ substance.

non-combustible

The chemical process which involves burning of a substance in the presence of oxygen with the release of heat is called __.

combustion

The substance that helps in combustion is called the __.

supporter of combustion

The minimum temperature at which a combustible substance starts burning is called its __.

ignition temperature

In most combustion reactions, __ present in air supports combustion.

oxygen

Activity-1 demonstrates that presence of a __ of combustion is necessary.

supporter of combustion

In the water–cup experiment, water prevents paper from attaining its __ temperature.

ignition

The ignition temperature of a splinter is less than that of a log of wood; hence it is easier to burn a __ than a log of wood.

splinter

Wood burns and produces heat and __.

light

Examples of fuels include petrol, kerosene, diesel, coal, wood, LPG, and __.

CNG