I finished undergrad in Mechanical, Thermal/Fluids track.
Between all the degrees and almost 9 years of school I racked up enough chemistry and chemical engineering credits that I'd be able to qualify at a GS-1320 Chemist. Never was a chemistry minor though. Realistically I the chem courses I took, with one exception, never got above the technical level of Gen Chem 102, despite that I've taken a few graduate level chemistry classes! The exception was a graduate level Nuclear Chemical Engineering course. It was cross listed NE and ChE, and the work was done in interdisciplinary groups. The nukes did the nuclear stuff, the chemies did the chemical stuff. We both looked at the others work as if it was magic. So even then I wasn't really exposed to it.
Got to do some exotic heavy metal, and actinide chemistry, and some ultra high thermochemsitry professionally. But I was a manager on those projects so never had to do the technical nitty gritty myself.