Question

Kerosene is a mixture of:
Aromatic hydrocarbons
Aliphatic hydrocarbons
Unsaturated hydrocarbons
Saturated hydrocarbons

Answer 1

- .Hint: Kerosene is a strong smell. Start by analysing, which kind of hydrocarbons give the strongest smell.

Complete step by step answer:
Kerosene is a fuel, which is obtained from crude oil. Its colour ranges from pale yellow to colourless. It is obtained from fractional distillation of petroleum at a temperature ranging from \[150{}^\circ C\]to \[275{}^\circ C\]. The number of carbons in a kerosene hydrocarbon chain ranges from ten to sixteen carbon atoms per molecule.
Kerosene is composed of 70% by volume of alkanes and cycloalkanes, 25% by volume of aromatic hydrocarbons (for example – alkylbenzene) and 5% by volume of olefins.
Therefore, amongst the given options, aromatic hydrocarbon is the most suitable answer. Aromatic hydrocarbons, as its name suggests, particularly have a strong aroma. These are the hydrocarbons that delocalized pi electrons. Its characteristic features include –
High Carbon: Hydrogen ratio
Tendency to undergo electrophilic and nucleophilic aromatic substitution reaction
Display aromaticity
Therefore, the answer is option (a), i.e., kerosene is a mixture of aromatic hydrocarbons.

Additional Information:
Kerosene has a flash point between \[37{}^\circ C\] and \[65{}^\circ C\]. Its heating value ranges from 43.1 MJ/kg to 46.2 MJ/kg.

Note: Kerosene is also called lamp oil, paraffin and coal oil. It is not only used in machinery, but also in kitchens (in kerosene stoves), chemical laboratories (as an extracting agent), as a cleaner for mucilage and adhesives and as a mosquito repellent.