To compare the staggered and eclipsed conformations of ethane, we need to understand the concept of torsional strain.$\\$• In the eclipsed conformation, the hydrogen atoms on adjacent carbon atoms are aligned with each other. This alignment leads to increased electron repulsion between the bonds, resulting in torsional strain.$\\$• In the staggered conformation, the hydrogen atoms on adjacent carbon atoms are staggered, meaning they are positioned at maximum distance from each other. This arrangement minimizes electron repulsion and thus reduces torsional strain.$\\$Let's analyze the options:$\\$Option 1: The staggered conformation of ethane is less stable than eclipsed conformation because staggered conformation has torsional strain.$\\$This statement is incorrect because the staggered conformation has less torsional strain and is more stable.$\\$Option 2: The eclipsed conformation of ethane is more stable than staggered conformation because eclipsed conformation has no torsional strain.$\\$This statement is incorrect because the eclipsed conformation has torsional strain, making it less stable.$\\$Option 3: The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has torsional strain.$\\$This statement is incorrect because the eclipsed conformation is less stable due to torsional strain.$\\$Option 4: The staggered conformation of ethane is more stable than eclipsed conformation because staggered conformation has no torsional strain.$\\$This statement is correct because the staggered conformation minimizes torsional strain, making it more stable.$\\$Therefore, the correct option is 4.