Which points on the potential energy diagram represent the eclipsed conformation of ethane and staggered conformation of propane respectively ?

Options

A. P,R
B. Q,R
C. S,P
D. R,Q

Answer

C

Explanation

Propane has more conformational energy as compare to ethane. In eclipsed conformation of ethane has more V.D.S. and torsional strain so it lies upper side in the P.E. diagram and staggered conformation of propane has less V.D.S. so it lies lower side in P.E. diagram.