Compound Classification by Structure

Steps:

• Examine the structural formula for carbon-carbon bonds: presence of single bonds indicates saturation.
• Count carbon atoms and hydrogens to confirm alkane formula (CnH2n+2).
• Check for functional groups or unsaturation like double bonds.
• Compare to choice definitions to select the match.

Why A is correct:

• Saturated hydrocarbons contain only single C-C and C-H bonds with no rings or multiple bonds, matching the general formula CnH2n+2 for alkanes.

Why the others are wrong:

• B: Alkenes have at least one C=C double bond, absent in this structure.
• C: Isomers of butane (C4H10) have the same formula but different arrangements; this compound matches butane directly, not an isomer.
• D: Addition with hydrogen occurs in unsaturated compounds like alkenes; saturated compounds do not react this way.

Final answer: A