Sahitya Bhawan lab Manual with theory, viva-voce questions and laboratory instruction for Class 9, 10, 11, 12 has been prepared in accordance with the NCERT, CBSE, up Board and other state boards syllabus. Practical book provides a better understanding of various concepts in a lucid manner. The entire matter is prepared in a way that it provides complete understanding of each topic. Viva-voice questions and answers helps the students in having a better understanding of concepts. Viva voce questions are followed with answers. After theory matter, blank pages are provided for writing experiments. Lab Manual series contains Science, Mathematics, social Science, Physics, Chemistry, Biology, physical Education.