Hello
Actually in this time if you try hard definitely you will score full marks in inorganic chemistry in your board so for that first of all study the NCERT books clearly I think you have  studied already but now please refer the previous year question papers and also some of the reference books like o p Tandon and other top books if you have any doubts on the important concepts please go for the online videos that will help you for in this time

And follow the time management skills don't waste single minute
If you follow this you will get good marks for sure

Good luck