Hello aspirant,

Chemistry is the one subject which is liked by majority of medical aspirants after biology. To be one of the top rankers one should master atleast one subject either chemistry or physics to the fullest.Even if you are average in the third subject,you can still pile up a huge score.

So, here is the preparation strategy for chemistry-

PHYSICAL CHEMISTRY

• Read NCERT- I recommend to atleast skim through the chapter if you are not able to read it fully.Solve the back exercises of these chapters atleast 3 times during the course of your preparation.
• Have a strong grasp over concepts 
  
• Solve Questions- I used to solve questions from physical everytime i wished to revise it.Your bonding with chapters such as States of matter, Thermodynamics, Equilibrium, Solutions, Electrochemistry, Chemical kinetics will strengthen only when you solve lots of questions from them.
• Books recommended- NCERT, Coaching notes/modules, any 1 reference book (Pradeep or ABC) for questions will suffice.

INORGANIC CHEMISTRY

• Here NCERT wins the race.Hands down.You should read it as many times as possible especially the p-block chapter of class 12th.There are around 4–6 questions from this chapter in the main exam.
• Learn the reactions of NCERT along with balancing- You may think that you will balance the reaction then and there, but considering the pressure during the exam it will be beneficial(saves time) if you are ready beforehand. 
  
• Give special emphasis to Co-ordination chemistry.This chapter alone usually comprises 3 to 5 questions.

ORGANIC CHEMISTRY

• Here also i highly recommend NCERT and its exercises.
• Write all the name reactions in a separate page and revise it regularly.
• Be thorough with the mechanisms of the reactions.
• Don’t forget to learn the chapters named polymers and chemistry in everyday life. These will easily gain you marks.
• Books recommended:- NCERT, coaching modules/notes, Bhakta and Ghoshfor questions, OP Tandon. Any good teacher’s notes will be highly beneficial for organic especially for mechanisms.

Do lots of previous year questions of various exams to get a better view of types of questions which come.

Hope this will be helpful...