In our daily life, we come across many substances such as food items, cleaning agents, and medicines. These substances have different properties, and one important way to classify them is as acids, bases, and neutral substances. This chapter introduces students to these three types and helps them understand their characteristics.
Students learn that acids are substances that have a sour taste, like lemon juice and vinegar. Bases are bitter in taste and feel soapy, like soap solution. Neutral substances do not show the properties of either acids or bases. To identify these substances, we use indicators such as litmus paper. Acids turn blue litmus red, while bases turn red litmus blue.
This CBSE Class 7 chapter notes also explain natural indicators like turmeric and china rose, which can also be used to test substances. This makes learning interesting and practical for students.
Get the CBSE Class 7 Science Chapter 2 notes on "Exploring Substances: Acidic, Basic, and Neutral." PDF for clear and organised explanations of acids, bases, indicators, and how to neutralise them. The notes are easy to read and include real-life examples and important ideas. Great for quick review and getting ready for tests, it helps students understand concepts better.
(Session 2026 - 27)