Dear Student
To be very frank time is very less now and you have to really work hard. if you have your old notes then start revising them and do previous years questions as these cover almost all the important concepts. if you don't have your notes then refer Arihant books.
 
All the best.                                                           
AKASH GOYAL
AskiitiansExpert-IIT Delhi
 
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start revising u r notes and practice more and more questions....all the best
						

							
dear prathamesh,
 
  start with the topics which iit most ofently asks like in organic go for aldol, ozonolysis,etc; similiarly go with physics like centre of mass, rotational and many more you practice on them and analyse ur perfromance ,within a month you'll find diff. in ur scoring pattern your score will easily shoot upto 30-40% more than what u do. this the time brother; make it full utilisation
 
with best wishes