Draw Newman projection of the less stable staggered from of butane.
b. Give reason for the relatively less stability of the staggered form.

Explanation

a. Two Newman projections for the staggered form of butane are

b. The less stability of such a form can be explained on the basis of van der waals strain because the group are not at the maximum distance from each other. Thus, the repulsive forces between them are more than in anti form.