1. Do not ignore the 11th standard syllabus. Even though you have limited time, 11th standard studies are your foundation and in my opinion harder than class 12th syllabus. Be concise in your revision, but thorough.
   If you see paper of 2015, there are questions from friction, KTG in Physics.
2. For Biology, read NCERT well. I would suggest 2–3 chapters each day. It has a very vast syllabus so do not take it lightly.
3. For Chemistry, I would suggest do not forget the reaction in OC (11th builds the base but all the reactions and topics are mainly in 12th).

Biotech, Cell cycle and Genetics are important but that doesn’t mean you ignore human and plant physiology.
Physics- you’ll require lots of question practice to become familiar with the equations (magnetics, electrostats, SHM, etc.) and do not become nervous in exam.
Chemistry- I don’t think they ask give reasons sort of questions (d & f block), but both other properties from s, p, d, f block are important. Also, the reactions and physical chemistry has both concepts and numericals.

1. Solve last 7 years of paper (within a week). Your target should be 1 paper each day. Give 3 hrs of time for solving. After you have finished, mark your tests and analyse the questions that you made wrong. Try to understand the concept behind that question.
2. Have you finished solving papers? If yes, you already have covered 75% of the syllabus. Well done!! Now you need to review only those chapters in your NCERT book that is related to the questions you have solved so far. This will take another 2 weeks at max.