hello,
paper weightage is not known as paper is set by board officials and that is highly confidential. so you have to practice and cover all part as much as you can. Make a plan such that you will cover most of the topics in less time.
Start from easy chapters and subjects then proceed towards difficult chapters. Cover difficult chapters multiple times. Keep practicing old chapters while covering new ones else you will forget old while reading new ones.
Hope it helps!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile