Question #5a9a9

1 Answer
Oct 3, 2017

The one in the centre and on the right are the same.

Explanation:

What matters here is the relative positions of the two hydroxyl groups - in the centre and right-hand diagrams, the groups are on adjacent carbon atoms of the benzene ring (this is called the ortho- position for the groups). The diagram on the left has the groups on the first and third carbon atoms, which is known as the meta- position.