 Students, CBST 10th board exams are starting from 15th of February. Do you know what are the weightages of different chapters in science? The expected weightage of unit 1 is 25 marks and the unit 1 can be in these chapters. The expected weightage of unit 2 is also 25 marks and these are the chapters in unit 2. Unit 3, 12 marks and unit 4, 13 marks. And the weightage of unit 5 is 5 marks. The high weightage chapters for biology are life process and genetics. The high weightage chapters for physics are current electricity, reflection and refraction. And the high weightage chapters for chemistry. Chemical reactions, carbon and its compounds.