Identify the alkane having two secondary carbon atoms.:

Step-by-step solution

A secondary carbon atom is one that is directly bonded to exactly two other carbon atoms. Let us analyze the given options: 1. Cyclohexane: All 6 carbon atoms in the ring are bonded to two other carbon atoms. Thus, it has 6 secondary carbon atoms. 2. 1,2,3,4-Tetramethylcyclohexane: The carbon atoms at positions 1, 2, 3, and 4 of the ring are tertiary (each bonded to two ring carbons and one methyl carbon). The carbon atoms at positions 5 and 6 are secondary (each bonded to two ring carbons). The four methyl carbons