Isopentane, a branched-chain saturated hydrocarbon with formula C₅H₁₂, is also called ______.

Explanation

Isopentane is the common name for 2-methylbutane, C₅H₁₂. Its branched five-carbon structure differs from isobutane, which has four carbons, and from unsaturated butadiene. Dimethylbutane contains six carbons.