question_answer

                The dihedral angle between two C?H bonds in the staggered conformation of ethane is:

A)                                                                                                                                                                                                         \[{{60}^{\text{o}}}\]      

B)                 \[{{180}^{\text{o}}}\]

C)                 \[{{0}^{\text{o}}}\]        

D)                 \[{{120}^{\text{o}}}\]

Correct Answer: A

Solution :

                                Staggered form is produced when rear arrangement of \[-C{{H}_{3}}\] groups is rotated as angle of 60° over front arrangement of \[-C{{H}_{3}}\] group.