The substances which give heat and light after combustion are called
The substance which undergoes combustion is said to be combustible. It is called fuel. If a magnesium ribbon is heated,it starts burning. When a magnesium ribbon burns, it combines with the oxygen of air to form magnesium oxide, and liberates heat and light.
Like fuels the sun also provides heat and light. The process taking place in the sun is called
Coal burns with
Burning of charcoal in a closed room will produce
The substances which have very low ignition temperature will
CNG and LPG are the examples of
Ignition temperature is
Combustion is a
The products of combustion are
A is the correct option.A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The products of combustion are carbon dioxide and water.
There are following zones of a flame
It is because there are only three zones in a flame i.e. dark zone, non luminous zone, luminous zone
Coal is a fuel which can produce flame.
The innermost part of the flame has very least temperature.
CNG stands for Common Natural Gas.
B is the correct option.Compressed natural gas (CNG) (methane stored at high pressure) is a fuel that can be used in place of gasoline, diesel fuel and liquefied petroleum gas (LPG).
Carbon monoxide is a poisonous gas.
Acid rain is very useful for the crops, buildings and the soil.
Oxygen is required for the burning of any substance.
The lowest temperature at which any substance catches fire is called ignition temperature.
Oxygen is the product of any burning process.
Carbon dioxide is the most common gas produced by burning.
C.N.G. and L.P.G. burn with sooty flame
They burn produced blue flame ,so they burn with a sooty flame.The blue is called "chemoluminescence". It's the light produced directly by the combustion reaction, and will therefore be present during most hydrocarbon fires. The yellow and orange (which provide most of the light from the actual fire) come from a more interesting source. When hydrocarbons burn without sufficient oxygen mixed in, they burn incompletely. This reaction produces tiny particles of solid carbon, which we generally refer to as 'soot'. The flame is full of this finely dispersed carbon, which gets heated by the combustion. A typical wood fire produces flames anywhere from 1000 K to 2000 K. At that temperature, the particles glow, giving off orange to yellow light. Those tiny bits of superhot carbon is what causes most of the light we see from fires.
Gas burners are generally designed to mix plenty of air in with the gas before it burns. so that incomplete combustion doesn't happen, soot doesn't get produced, and so all you see is the blue from the combustion. But if you block some of the air from getting into the burners, you'll find that gas flames burn just as yellow as wood.
All the fuels burn with blue flame.
The correct option is B.
All the gases which undergo combustion produce flame. But only those solids and liquid fuels which vaporise on being heated,burn with the flame