CBSE Class 9 Chemistry Is Matter Around Us Pure?
Classification of Matter
Classification of matter as pure substances and mixtures, elements and compounds, and homogeneous and heterogeneous mixturesSolution, Suspension and Colloidal solutions
Solution, Suspension and Colloidal solutionsTypes of Changes
In physical changes, no new substance is formed and the changes are temporary and reversible.
A process in which one substance reacts with another substance to undergo a change in chemical composition is known as chemical change.
Chemical changes are generally irreversible and can only be reversed under extreme conditions.
