Hi, 

Well this is the tricky part actually. Students tend to face a lot of confusion as how to manage 12th prep and entrance prep.

Well if u r goin to any coaching institution since 11th dn u wud nt face dat much trouble as d institute will make u prepare for both.. U ll b attending coaching and also school/college so u have to study for both..

Buymt if u r nt goin into any coaching institution dn it all comes down to you. 

You have to divide d day into two segments one for entrance prep and d other for 12th std boards.

Make sure to keep ur basics strong and try to keep in touch with 11th std chptrs.. Difficult to do d 11th portion while preparing fr boards so i wud suggest study the theory of 12th as it ll b taught u at d current moment.. Nd in addition to dt solve mcqs from 11th portion.. One chpter in a day/particular portions.  As it suits u... Basic idea is to not loose touch with d 11th portion as well as simultaneously do the 12th part. Make sure to keep ur fundamentals clear in both 11th and 12th portion coz dt shall play a vital role in helping with any entrance.

Pay special attention to solving as many questions as possible. 

All the best.