Class 7 Exam > Class 7 Videos > Science (Curiosity) Class 7 - New NCERT > Exploring Substances: Acidic, Basic, and Neutral
Exploring Substances: Acidic, Basic, and Neutral Video Lecture | Science (Curiosity) Class 7 - New NCERT
FAQs on Exploring Substances: Acidic, Basic, and Neutral Video Lecture - Science (Curiosity) Class 7 - New NCERT
| 1. What are acidic substances and how can we identify them? |  |
Ans. Acidic substances are those that have a pH value less than 7. They can donate protons (H+) in a solution. We can identify them using indicators like litmus paper, which turns red in the presence of an acid, or by using pH meters to measure the acidity level directly.
| 2. What are basic substances and how do they differ from acids? | |
Ans. Basic substances, also known as alkaline substances, have a pH value greater than 7. They can accept protons or donate hydroxide ions (OH-) in a solution. Unlike acids, which turn litmus paper red, basic substances turn litmus paper blue.
| 3. What is a neutral substance and what is its pH value? | |
Ans. A neutral substance has a pH value of exactly 7. This means it is neither acidic nor basic. Water is a common example of a neutral substance, as it does not affect the pH balance of a solution.
| 4. Why is it important to understand the properties of acids and bases? | |
Ans. Understanding the properties of acids and bases is crucial because they play significant roles in various chemical reactions, biological processes, and everyday products. For example, they are essential in digestion, cleaning agents, and even in the environment, affecting soil and water quality.
| 5. How can we safely handle acids and bases at home or in school? | |
Ans. When handling acids and bases, it is important to wear safety goggles and gloves to protect your eyes and skin. Always use them in a well-ventilated area and follow proper dilution techniques. Never mix different chemicals unless instructed, as it can cause dangerous reactions.
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