A solid has a definite size and shape which does not change its state without any external condition. In solids, particles are very close to each other due to strong intermolecular force which keeps their particles in a fixed position. Due to this factor solids are hard and rigid and cannot be compressed. When the atoms are forced to come closer, the intermolecular force becomes repulsive. With an increase in thermal energy, the kinetic energy of the molecules increases resulting in the conversion of a solid into a liquid. It is necessary to study solid-state physics, in general, the researcher and student must be informed of examples and exercises that give an idea of the mathematical and scientific applications of the topics and equations of solid-state physics. Therefore, this book has been prepared in a simple way to include questions and exercises in the form of multiple-choice in the solid-state physics branch, which helps the student to take a preconceived idea of the questions in this field. This book contains: Chapter One: Introduction and A list of some important constants . Chapter Two: Various questions in Solid State Physics Crystal Geometry, Structure , Defects, Photoelectric effect, Semiconductors and nanomaterial. Chapter Three: Answers to all the questions in Chapter Two.