Chemical Reactions and Equations Practice Questions 2025: Get here the FREE PDF download for the CBSE Class 10 Science Competency-Based Questions of Chapter 1 for the 2025 board exams.

CBSE Class 10 Science Chemical Reactions and Equations Weightage in 2025 Board Exams. For the CBSE Class 10 Science exams in 2024-25, the unit-wise weightage is as follows.

When an equation of a chemical reaction is written, it is “balanced” to show this. A balanced chemical equation shows that no atoms are destroyed and no new atoms are created in the chemical reaction.

National 5 Chemistry Chemical changes and structures learning resources for adults, children, ... Chemical equations must be balanced so that the quantities of reactants and products match.

“THE inability to balance a chemical equation is a most common difficulty to students of chemistry.” The author has attempted to remedy this very common weakness, and in addition to a concise ...