Ans. The best way to evaluate your progress before exam is solving as many question sets as possible. It will strengthen your knowledge of concepts as well as increase your efficiency in providing prompt answers.
Besides explanations and keys, class 9 NCERT Science solution also comes with practice exercises formulated by learned scholars to help you improvise on your reasoning skills which is very crucial for a subject like Science. You can also refer to NCERT class 9 Science solutions for last minute notes and suggestions.