Hi

Your profile suggests that you are from Maharashtra.

You can download 12th Maharashtra board syllabus for science stream at:-

https://school.careers360.com/boards/msbshse/maharashtra-hsc-syllabus

This  syllabus  will  be  very  helpful  in  your  preparation  because  it  will  let  you know  the  topics  and  chapters which are included  in  your  examination   , so go well  through  your  syllabus  and  plan your  studies  so  that  you  can  score  well in  your  board  examination.

And yes ,  try  to  complete  your  whole syllabus at  least a   month before of your board   examination   so that you can give your  last one  month for  practicing mock test  papers and  revision .

To help you further,

Here are some tips to excel in your board examination:-

-----------------) Go well through your textbooks

-----------------) While covering the syllabus, make revision a part of your routine.

-----------------) Practice at least 10 years previous year question papers

-----------------) Solve at least 3 to 5 mock test papers for each subject to ace your board examination

Thank you