What is the line structure of o-chlorotoluene?

Answer 1

The first part to understand is that toluene is a benzene with a methyl group attached to one of the carbons.

The o stands for ortho. So, it informs us that the chlorine is attached to the carbon next to the methyl group.

The main thing here is understanding what functional group toluene is and where to position the chlorine which is specified with the o meaning ortho.