Question

Which of the following has lower Ignition temperature
(A) Wood
(B) Paper
(C) Vegetable oil
(D) Kerosene oil

Answer 1

Hint : When fuel is burned then an exothermic reaction takes place it means lots of energy is released in the surrounding. Fuel is used as a source of energy (capacity of doing work). Different forms of energy produce different types of substances.

Complete Step By Step Answer:
Ignition temperature may be defined as the minimum temperature required to burn a substance and produce energy. Different substances have different values of ignition temperature. Ignition temperature is also known as autogenously ignition temperature.
The lower ignition temperature of a given temperature is Kerosene oil.
Hence option D is the correct option.

Additional Information:
The main source of kerosene oil is petroleum. When kerosene oil burns then an exothermic reaction takes place which means a large amount of energy is released in the surrounding so it is used as a fuel.
Kerosene oil is also known as lamp oil, coal oil or paraffin. Kerosene oil is volatile in nature. Kerosene oil mainly produced by the process of fractional distillation. Fractional distillation is a process used to differentiate the compound from the mixture of compounds.
The density of the kerosene oil is $0.81g/c{m^3}$ . It is low viscous in nature mainly present in liquid form at room temperature. The density of the kerosene oil varies with temperature, when temperature decreases then the density of kerosene oil will increase.
Kerosene oil is not dissolved in water because it does not form hydrogen bonds with water molecules. So it is insoluble in water.

Note :
In rural areas the kerosene is mainly used as a source of lightning.
Kerosene oil is used as an insecticide to kill the insects.
kerosene oil does not react with highly reactive metals. So sodium metal is placed in kerosene oil because kerosene does not react with sodium metal.