question_answer

In the eclipsed conformation of ethane, the dihedral angle between the hydrogen atoms of adjacent methyl groups is

A)  \[60{}^\circ \]                                  

B)  \[120{}^\circ \]

C)  \[0{}^\circ \]                                     

D)  \[180{}^\circ \]

Correct Answer: C

Solution :

                In the eclipsed conformation of ethane, each of the hydrogen atom on the back carbon lies exactly behind each of the hydrogen atoms on the front carbon and the dihedral angle between the two is\[0{}^\circ \].