Identify the correct statement with respect to unsaturated hydrocarbons.
Compounds of carbon having double bonds or triple bonds between their carbon atoms are called unsaturated compounds.
Hydrocarbons are organic compounds made up only of carbon and hydrogen. They are classified by the nature of the carbon–carbon bond in the chain.
When adjacent carbon atoms are joined by only single bonds (e.g. methane, ethane), the compound is saturated because every carbon is bonded to the maximum possible number of hydrogens.
When two or more carbon atoms are linked by double bonds or triple bonds (e.g. ethene C=C, ethyne C≡C), fewer hydrogens are attached, and the compound is unsaturated. Such multiple bonds can undergo addition reactions, which is the defining chemistry of unsaturated hydrocarbons.
Hence the correct statement is option (B): compounds of carbon having double or triple bonds between their carbon atoms are called unsaturated compounds.
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