The question I have set is: (italics mean subscript)
The chlorinated alkene, C3H4Cl2, has five structural isomerisms that are alkenes and two other structural ismoersims that are not alkenes.
Draw the five structural alkenes.
But I can come up with a total of 7 isomerism's if I include E and Z isomerism's and five without these. So do E Z isomerism's get disregarded and if so which ones am I meant to draw?!