The best way to memorize is to write while read. It not only helps you to memorize but also keeps a handy note ready for reference. Being a Science student myself, I can relate to your situation. Students face problem in memorizing these chapters because they are confusing and need more and more practice. I would like to give a personal suggestion and that is you can practice multiple choice questions of the exam for which you are preparing. You can refer to MTG Chemistry books for mcq practice.