Here we provide Class 9 chemistry important notes,board questions and predicted questions with Answers for chapter Hydrogen. These important notes,board questions and predicted questions are based on ICSE board curriculum and correspond to the most recent Class 9 chemistry syllabus. By practising these Class 9 materials, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 9 Board examinations as well as other entrance exams such as NEET and JEE.