S. Chand CBSE SCIENCE FOR NINTH CLASS PART- 1 PHYSICS, (new edition 2016) (9789352530250) By - Lakhmir Singh & Manjit Kaur MOTION FORCE AND LAWS OF MOTION GRAVIATION WORK AND ENERY SOUND Mutiple Choice Questions (MCQs) BASED ON PRACTICAL SKILLS SCIENCE (Physics) NCERT BOOK QUESTIONS AND EXERCISES (WITH ANSWERS) VALUE BASED QUESTIONS (WITH ANSWERS