The dihedral angle of the least stable conformer of ethane is $....\,^{\circ}$.

Which of these factors does not govern the stability of a conformation in acyclic compounds?

Which one is the most stable conformer of $n$-butane?

How can you define skew conformation?

The dihedral angle in the staggered form of the Newman projection of $1,1,1-$trichloroethane is $60^{\circ}$. (Round off to the nearest integer)

Statement $I$: Staggered conformation of ethane is more stable than the eclipsed conformation.
Statement $II$: The torsional strain in staggered conformation is more than in the eclipsed conformation.