Question

Which of the following is not a mixture of hydrocarbons?
(A) candle wax
(B) Kerosene
(C) Vegetable oil
(D) Paraffin oil

Answer 1

Hydrocarbon is self-explanatory which means compounds of carbon and hydrogen only.
-It plays a key role in our daily life. All fuels contain a mixture of hydrocarbons, which are a source of energy.

Complete answer:
Hydrocarbons are of different types Depending upon the types of carbon-carbon bonds present, Hydrocarbons are used for the manufacture of Polymers like polythene, Polypropene, Polystyrene etc.
(A) candle wax is mixture of aliphatic or saturated hydrocarbons recovered from crude oil by distillation
(B) Kerosene is a mixture of Hydrocarbons. The chemical composition depends on its source, but is usually consists of about $10$ different hydrocarbons, each containing to $10\,{\text{to}}\;16$ carbon atoms per molecule
(C) Vegetable oils are usually edible. Non-edible oils derived mainly from Petroleum and called Mineral oils
Fatty acid and glycerol are components of vegetable oil. Vegetable oils are not hydrocarbons, they contain oxygen as well.
(D) Paraffin oil or wax is a soft colorless solid derived from petroleum, or oil that consists of a mixture of hydrocarbon
It is distinct from Kerosene and other Petroleum products that are sometimes called Paraffin oil.
So, The correct answer is (C).

Additional Information: Aromatic Hydrocarbons are special types of cyclic compounds. It can help to construct a large number of models of such molecules of both type (open and close chain) Keeping in mind that carbon is tetravalent and hydrogen in monovalrvet for making models of alkane
We can use toothpicks for bonds and plastic balls for atoms.
For alkene, alkynes and aromatic hydrocarbons, spring models can be constructed.

Note: A hydrocarbon is said to be saturated, it contains only $C - C$ single bonds. If unsaturated, it contains $C = C$ or $C \equiv C$ multiple. Benzene and its derivatives are called Aromatic compounds.