🧪 Exploring Substances: Acidic, Basic, and Neutral
Science – Chapter 2 (Questions & Answers)
Q1. What are acidic substances?
Answer: Acidic substances are those that have a sour taste and turn blue litmus paper red.
Q2. What are basic substances?
Answer: Basic substances have a bitter taste and turn red litmus paper blue.
Q3. What are neutral substances?
Answer: Neutral substances do not change the color of litmus paper and are neither acidic nor basic.
Q4. What is an indicator?
Answer: An indicator is a substance that changes color to show whether a substance is acidic or basic.
Q5. Give examples of natural indicators.
Answer: Turmeric, china rose, and litmus are natural indicators.
Q6. What happens when an acid reacts with a base?
Answer: They neutralize each other to form salt and water. This reaction is called neutralization.
Q7. What is the importance of neutralization?
Answer: It is used in treating acidity, soil treatment, and controlling environmental pollution.
Q8. Give examples of acidic substances.
Answer: Lemon juice, vinegar, and curd.
Q9. Give examples of basic substances.
Answer: Soap, baking soda, and lime water.