answer:look in the textbook at the states in which the compounds are labelled in example reactions. They are extremely unlikely to be different in an exam. If they are, it will be a “A* mark” and will happen only once, and you’re not expected to get it anyway. So yeah, remember them. Once you get a feel for organic chemistry, it will just be mostly intuitive… but then, most people never get a “feel” for organic chemistry hahahah.