My husband’s undergrad is chemical engineering, and he went on to get a law degree. His last job was at a big oil company, doing environmental regs and compliance. He said law school was easy compared to chemical engineering, but chem e is what helped get him into law school.
I think you can only give some advice and talk about why a particular major is being looked at and ask the usual questions including the big one: Can you support yourself when you graduate, and how?