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Answer 1

Answer:

Alkanes are the simplest hydrocarbons with all C-C bonds. Therefore, they are called saturated hydrocarbons. General formula for alkanes is CnH2n+2. All carbon atoms tend to complete their tetra valency by bonding with the same or different atoms. In alkanes, all carbon atoms form single covalent bonds with other carbon atoms.

The parent chain can be branched or unbranched and on the basis of that chemical and physical properties change. Alkanes are less reactive compared to other hydrocarbons like alkenes, alkynes etc. This is because, in alkanes, all carbon atoms are bonded with single covalent bonds which are strong and less reactive compared to double or triple covalent bonds of alkenes and alkynes respectively.

The members of the homologous series of alkanes are differed from each other by -CH2 unit. As the number of carbon atoms increases in the series, the molecular mass also increases.