Hmm… I have a twist on this. Chemistry is a really big field.
My degree is in computational/theoretical chemistry. Even before I went into software engineering, it would have been really odd for me to be asked questions about wet chemistry.
Admittedly it would have been odd to be quizzed on theory out of the blue as well.
What would not have been odd was to give a job talk and be asked questions based on that talk; in my case this would have included aspects of theory relevant to the simulation work and analysis I presented.
My degree is in computational/theoretical chemistry. Even before I went into software engineering, it would have been really odd for me to be asked questions about wet chemistry.
Admittedly it would have been odd to be quizzed on theory out of the blue as well.
What would not have been odd was to give a job talk and be asked questions based on that talk; in my case this would have included aspects of theory relevant to the simulation work and analysis I presented.