So, students must revise all the major chemical reactions, equations and diagrams involved in Chemistry, Physics and Biology parts of CBSE Class 10 Science.

subscript , so writing Na2O would be wrong. This diagram shows that one carbon atom and two oxygen atoms combine to make up the units of carbon dioxide. Its chemical formula is written as CO 2.

“Topics such as Balancing of chemical equations, acid base and salt, digestion, excretion, circulatory and reproductive systems – all practised with labelled diagrams, can increase the chances ...