The Central Board of Secondary Education CBSE conducts practical examination for Class X students. This laboratory manual has been designed to help Class X students prepare for Experiments and Viva Voce for Science.The present book for CBSE Class X Science Experiments and Viva Voce has been divided into two parts namely Term I and Term II covering the syllabi of Term I and Term II. The Term I section covers To find the pH of the following samples by using pH paper universal indicator To study the properties of acids and bases To perform observe the action of water on quicklime classify the reaction To observe the action of Zn Fe Cu and Al metals on various salts to study the dependence of potential difference across a resistor on the current passing through it and determine its resistance to determine the equivalent resistance of two resistors when connected in series combination to prepare a temporary mount of leaf peel to show its stomata to show necessity of light during the process of photosynthesis whereas the Term II covers to study the properties of acetic acid to study saponification reaction for the preparation of soap to study the comparative cleansing capacity of a sample of soap in soft and hard water to determine the focal length of concave mirror and convex lens by obtaining the image of a distant object to study binary fission in Amoeba to trace the path of the rays of light through a glass prism to identify the different parts of an embryo of a dicot seed etc. The book cum Laboratory Manual also contains Coloured Diagrams along with general introduction of laboratory work and commonly used apparatus. Also lab instructions and safety procedures have been provided in the book.As the book cum laboratory manual covers all the experiments and viva voce it for sure will help Class X students prepare their best for CBSE Class X Science Practical Examination.