Unsaturated hydrocarbons that contain one or more double bonds are called alkenes. The name of a specific alkene always ends in –ene and has a prefix indicating the number of carbon atoms.

hexyne

Unsaturated hydrocarbons are hydrocarbons that have double or triple covalent bonds between adjacent carbon atoms….Combustion.

Like alkenes, alkynes are unsaturated because they are capable of reacting with hydrogen in the presence of a catalyst to form a corresponding fully saturated alkane. Because alkynes possess two π bonds per molecule, they are said to contain two elements of unsaturation.

Their general formula is thus CnH2n–2. Compounds containing double or triple bonds are often referred to collectively as unsaturated compounds. Because of their multiple bonds, alkenes and alkynes are usually more chemically reactive than alkanes and aromatic hydrocarbons. Figure 1) joining the two atoms together.

An unsaturated hydrocarbon is a hydrocarbon containing at least one double or triple bond. An alkene is a hydrocarbon containing double bonds. Ethene, C2H4, is an example of an unsaturated hydrocarbon. Other examples of unsaturated compounds are benzene, C6H6, and acetic acid, C2H4O2.

A hydrocarbon molecule containing one or more double or triple bonds, and can thus absorb more hydrogen atoms.

Answers

• Unsaturated hydrocarbons have double or triple bonds and are quite reactive; saturated hydrocarbons have only single bonds and are rather unreactive.
• An alkene has a double bond; an alkane has single bonds only.
• saturated; alkane. unsaturated; alkyne. unsaturated; alkene.

The answer is (c) (ii) and (iv) Option (ii and (iv) having double and triple bonds, hence they are unsaturated hydrocarbons.

C4​H8​ is an alkene with the general formula; Cn​H2n​ and thus an unsaturated compound.

Simple hydrocarbons and their variations

Among the numerous types of organic compounds, four major categories are found in all living things: carbohydrates, lipids, proteins, and nucleic acids.

The difference between Ionic and Molecular Compounds is that the electrons of atoms in ionic compounds are transferred between the elements because of the presence of a difference in electronegativity. However, in the case of molecular compounds, the electrons are only shared but not transferred.