An organic chemistry solution manual may very well be the most valuable expense that will help you pass your organic chemistry course.
And that's because the manual helps you practice. The only way to master organic chemistry is to practice, practice, and practice some more. You can take o level chemistry tuition via https://twig.sg/o-level-chemistry-tution-singapore/.
But for the practice to be valid, and to ensure that you learn from your practice, you must have a means of checking your work and comparing your step by step solutions.
Perhaps your professor has shown you a handful of problems in class. Perhaps your professor even went so far as to review the homework problems in class (maybe even handing out a guided solution) and leave you feeling somewhat confident.
But your exam questions will not be the careful queries allocated in your schoolwork. There is no way to predict what types of questions will show up. And so you have to find additional problems in your book to practice.
These include questions that show up within the chapter, as the book takes you through each concept. And the 50+ questions that typically appear at the end of the chapter for additional practice. These 50+ problems will take the information you've learned, and change each question just enough to leave you temporarily confused.
And so you are forced to think, apply concepts, and attempt to come up with a proper solution.