Class 7 Science Curiosity Ch-2 Exploring Substances Acidic, Basic & Neutral NCERT Solutions 2025 Q-A
@fusionbasic Class 7 Science Curiosity Ch-2 Exploring Substances Acidic, Basic & Neutral NCERT Solutions 2025 Question Answer Let Us Enhance Our Learning Class 7 Science Curiosity solutions provide answers and explanations for the exercises and questions found in the "Science Curiosity" textbook for Class 7. you will find comprehensive solutions for each chapter of Class 7 science, complete with attractive illustrations. NCERT Solutions Class 7 Science (Chapter-Wise) Detailed explanations: Examples of topics covered in Class 7 Science Curiosity: The Ever-Evolving World of Science: Explores the nature of science and how it works. Exploring Substances: Acidic, Basic and Neutral: Introduces acids, bases, and salts and their properties. Electricity: Circuits and Their Components: Explains the basics of electricity and electrical circuits. The World of Metals and Non-Metals: Discusses the properties of metals and non-metals. Changes Around Us: Physical and Chemical: Explores different types of changes that occur in the environment 1. A solution turns the red litmus paper to blue. Excess addition of which of the following solution would reverse the change? (i) Lime water (ii) Baking soda (iii) Vinegar (iv) Common salt solution 2. You are provided with three unknown solutions labelled A, B, and C, but you do not know which of these are acidic, basic, or neutral. Upon adding a few drops of red litmus solution to solution A, it turns blue. When a few drops of turmeric solution are added to solution B, it turns red. Finally, after adding a few drops of red rose extract to solution C, it turns green. Based on the observations, which of the following is the correct sequence for the nature of solutions A, B, and C? (i) Acidic, acidic, and acidic (ii) Neutral, basic, and basic (iii) Basic, basic, and acidic (iv) Basic, basic, and basic 3. Observe and analyse Figs. 2.13, 2.14, and 2.15, in which red rose extract paper strips are used. Label the nature of solutions present in each of the containers. 4. A liquid sample from the laboratory was tested using various indicators: Based on the tests, identify the acidic or basic nature of the 5. Manya is blindfolded. She is given two unknown solutions to test and determine whether they are acidic or basic. Which indicator should Manya use to test the solutions and why? 6. Could you suggest various materials which can be used for writing the message on the white sheet of paper (given at the beginning of the chapter) and what could be in the spray bottle? Make a table of various possible combinations and the colour of the writing obtained. 7. Grape juice was mixed with red rose extract; the mixture got a tint of red colour. What will happen if baking soda is added to this mixture? Justify your answer. 8. Keerthi wrote a secret message to her grandmother on her birthday using orange juice. Can you assist her grandmother in revealing the message? Which indicator would you use to make it visible? 9. How can natural indicators be prepared? Explain by giving an example. 10. Three liquids are given to you. One is vinegar, another is a baking soda solution, and the third is a sugar solution. Can you identify them only using turmeric paper? Explain. 11. The extract of red rose turns the liquid X to green. What will the nature of liquid X be? What will happen when excess of amla juice is added to liquid X? 12. Observe and analyse the information given in the following fl owchart. Complete the missing information. liquid and justify your answer. Imagine a garden with plants showing signs of poor health. The soil can be _____ in nature. The soil can be _____ in nature. Which indicator can be used to test the nature of the soil? _________ The acidic soil can be treated with ________________________. The basic soil can be treated with __________
