Read and download the Class 7 Acids Bases and Salts Notes for exams. Designed for 2025-26, this advanced study material provides Class 7 Science students with detailed revision notes, sure-shot questions, and detailed answers. Prepared by expert teachers and they follow the latest CBSE, NCERT, and KVS guidelines to ensure you get best scores.
Advanced Study Material for Class 7 Science Chapter 5 Acids Bases and Salts
To achieve a high score in Science, students must go beyond standard textbooks. This Class 7 Chapter 5 Acids Bases and Salts study material includes conceptual summaries and solved practice questions to improve you understanding.
Class 7 Science Chapter 5 Acids Bases and Salts Notes and Questions
Class 7 Acids Bases and Salts Notes for exams. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations. Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.
Smart Notes
Substances may be classified as-
● Acid
● Bases
● Salts
Acids-
● Taste sour
● Contain replaceable hydrogen radical
● May be organic or mineral
● Turn blue litmus red
● Some commonly found acids are- Hydrochloric acid, nitric acid, sulphuric acid, acetic acid, lactic acid, citric acid etc
Mineral and organic acids-
● Mineral acids are found in nature in rocks.
● Are strong
Common mineral acids- Hydrochloric acid, nitric acid, sulphuric acid
* Acids must NOT be tasted to identify.
Organic acids-
● Are found in plants and animals
● Are weak acids.
Common organic acids are Acetic acid(vinegar), Lactic acid(in milk and curd, formic acid(in ant sting), citric acid(in citrus fruits like lemon and orange), oxalic acid(in spinach), ascorbic acid(in citrus fruits and amla), tartaric acid(in tamarind, grapes, unripe mangoes etc.)
Bases-
● Are bitter to taste
● Are soapy to touch
● Contain replaceable hydroxide radical
● Turn red litmus blue
● Turn phenolphthalein pink
Common bases are sodium and potassium hydroxide (used in making soap), magnesium hydroxide(milk of magnesia), ammonium hydroxide(used as window cleaner), calcium hydroxide(lime water)
Acids and bases must not be tasted to be tested. Indicators are chemical substances which change colour in presence of acidic or basic medium and are used to identify whether a substance is acidic, basic or neutral. Some common indicators are litmus (obtained from lichens plant), phenolphthalein, methyl orange, turmeric, China rose etc.
A non metal is made to react with oxygen. This forms an oxide. The oxide when dissolved in water forms an acid.
A metal reacts with oxygen to form a basic oxide. This oxide when dissolved in water forms a base.
Bases which dissolve in water are called alkali. All alkalies are bases but all bases may not be alkali (as they may not dissolve in water)
Neutralisation- An acid reacts with a base to form salt and water. This reaction is called neutralization reaction. Heat is released during a neutralization reaction.
Uses of neutralization-
● Curing acidity in the stomach
● Neutralizing acidity or basicity of soil
● Curing ant sting
● Cleaning surfaces soiled with acids etc.
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Important Practice Resources for Class 7 Science
CBSE Class 7 Science Chapter 5 Acids Bases and Salts Study Material
Students can find all the important study material for Chapter 5 Acids Bases and Salts on this page. This collection includes detailed notes, Mind Maps for quick revision, and Sure Shot Questions that will come in your CBSE exams. This material has been strictly prepared on the latest 2026 syllabus for Class 7 Science. Our expert teachers always suggest you to use these tools daily to make your learning easier and faster.
Chapter 5 Acids Bases and Salts Expert Notes & Solved Exam Questions
Our teachers have used the latest official NCERT book for Class 7 Science to prepare these study material. We have included previous year examination questions and also step-by-step solutions to help you understand the marking scheme too. After reading the above chapter notes and solved questions also solve the practice problems and then compare your work with our NCERT solutions for Class 7 Science.
Complete Revision for Science
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