Can you give me a marking scheme of the final papers of class 11 so that I can prepare according to that and know that which chapter is important and which one is minor . This is my humble request ... U can also give ur marking scheme .. And our paperis going to be of 100 marks out of which 30 marks of practial(neglect practical) .. I want 40 marks to pass the subject as I am weak in this subject ..

For the marking scheme of all the chapters in chemistry, you can refer to the following link

https://img-nm.mnimgs.com/img/study_content/syllabus/1/11/chemistry.pdf

the chapter-wise weightage has been given in the above link. Secondly, chemistry, as a subject is very scoring. With proper planning and time management, you can easily score good marks in this subject. First, go through your NCERT textbook once thoroughly. Pick out the topics which you feel are difficult and need more attention. Focus more on those topics. You can refer our study material for those topics. Many topics have been explained with the help of videos and animations, which will help you understand the concepts better. Also, it will be helpful if you practice the solved examples from the textbook, and the questions given at the end of the chapter. You can also refer the NCERT solutions available on our website. You can also refer chapter tests and model tests for your practice. 

Also, it is important that you make a daily schedule, according to your routine and follow it without fail. Proper practice and timely revision will give you more confidence and help you score better.