Write the formulas of the three singly chlorinated isomers formed when 2,2-dimethylbutane reacts with cl2 in the presence of light.

The molecule with same molecular formula but different arrangement of atoms is said to be an isomer.

When 2,2-dimethylbutane reacts with chlorine in the presence of light gives three isomers that is (3-chloro-2,2-dimethylbutane), (1-chloro-2,2-dimethylbutane) and (1-chloro-3,3-dimethylbutane).

In above case, the molecular formula of all isomers are same i.e.but chlorine is arranged in different positions of carbon. Thus, results isomers.

The reaction is shown in the image.