Hello aspirant , for syllabus stick to 11 and 12 NCERT , and apart from that you can see previous year trends. 

See physics can only be tackled by regular practice. Number of formulae are limited and only the values or the wording of the questions get twisted each year,Be thorough with NCERT formulae which are a basic fundamental which cannot be overlooked.In Physics for theoretical questions stick to NCERT . Read all the lines no matter how useless they seem as in modern physics. Backside question should be clear perfectly .

Physical chemistry I suggest you use a supplementary book as it has numericals (You can stick to MTG )

Inorganic chemistry ke liye strictly NCERT (I don't think they have asked any question beyond NCERT In it ) 

Organic chemistry .... Most important thing is understanding the chapter BASIC PRINCIPLES AND REACTION MECHANISM..All the rest of the chapters become cakewalk after this chapter is mastered.you need loads of practice so an extra book (MTG).. And no point in repeating , learn NCERT . 

Biology -: Stick to NCERT , every line and diagram is important and solve as many questions as you can.

For aspirants career360 has an amazing plan -:

Careers360 is conducting the All India Talent search exam where students of 11th and 12th PCM/PCB can test their knowledge and enhance their preparation by knowing their stronger and weaker areas and win prizes and scholarships worth ₹1.25 Crore.

If you are an Engineering or medical aspirant, it is a great opportunity for you. Take the test, perform the best, avail the scholarship and win prizes.

You can win exciting prizes such as:

₹50,000/- cash Prizes, Upto 100% Scholarship on JEE / NEET AI-Based preparation packages, Laptops, Smartphones, Amazon Echo, Careers360 Almanacs, Powerbanks, Upto ₹250/-  paytm *Cashback offer

Link: https://learn.careers360.com/careers360-talent-search-exam/?icn=qna&ici=interns

All the best..

Hello

Focus on these topics-

Physics – Mechanics, Optics, Thermodynamics and Nuclear Physics

Chemistry – Mole Concept, General Organic Chemistry, Periodic Table, Chemical Bonding, Coordination Chemistry

Biology- Ecology and Environment, Genetics, Cell Biology; Morphology, Reproduction and Physiology of Plants and Animals; Basics of Biotechnology.