Essential Chemistry for IGCSE - Organic Chemistry And Petrochemicals (Section 4 - No. 1)

What is the key difference between a saturated and an unsaturated hydrocarbon?
Saturated hydrocarbons contain only single bonds; unsaturated hydrocarbons contain at least one double or triple bond.
Saturated hydrocarbons are always liquid at room temperature; unsaturated hydrocarbons are always gases.
Saturated hydrocarbons are cyclic; unsaturated hydrocarbons are linear.
Saturated hydrocarbons contain only carbon and oxygen; unsaturated hydrocarbons contain hydrogen.

Explanation

Saturated hydrocarbons contain only single bonds, whereas unsaturated ones have at least one double or triple bond between carbon atoms.

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