Important Questions for Class 7 Science Chapter 4 Acids, Bases and Salts - FREE PDF Download
FAQs on CBSE Class 7 Science Important Questions Chapter 4 - Acids, Bases and Salts
1. In what ways does a neutralisation reaction is helpful, according to Vedantu’s Important Questions in Chapter 4 of Class 7 Science?
Some applications of neutralisation are:
Indigestion – Antacid helps in curing acidity as it neutralises the effect of excessive acid.
Ant bite – By rubbing baking soda or calamine solution neutralises the effect of acid injected into the skin when an ant bites.
Soil treatment – When the soil is too basic or acidic, it damages the growth of the plants. Acidic soil is treated with base and basic soil is treated with acid.
Factory Wastes – Basic substances are added to industrial wastes so that they do not harm river water.
2. Write some differences between acids and bases, according to Vedantu’s Important Questions in Chapter 4 of Class 7 Science.
Following are some differences between acids and bases:
(a) Bases:
Basic substances are soapy in nature and are bitter in taste.
These substances turn red litmus blue.
Except for ammonia, all bases are odourless.
Bases show slippery nature.
Basic solutions turn green when the china rose indicator is used.
(b) Acids:
Acidic substances are sour in taste.
They turn blue litmus red.
These substances give a burning sensation.
Acids show sticky nature.
Acidic solutions turn dark pink when a china rose indicator is used.
3. What do you understand about acid rain, according to Chapter 4 of Class 7 Science Vedantu’s Important Questions?
Acid rain is defined as precipitation or rain which contains acids in excessive amounts. Acid rain is caused due to the rise of contaminants in the air. Harmful and polluting gases like carbon dioxide, carbon monoxide, nitrogen oxides, and sulphur combine with rainwater and form acid rain. This rain is dangerous for buildings as it corrodes them. It also causes many skin problems. It shows the negative impact on animals and plants.
4. What are the best study materials used for studying Chapter 4 of Class 7 Science by Vedantu?
Chapter 4 “Acids, Bases and Salts” of Class 7 Science is an interesting Chapter. Students can prepare this Chapter from various study materials. They should use the NCERT book to read this Chapter. The questions of the NCERT book will enable students to comprehend the Chapter in a better way. The important questions of this Chapter will clear your concepts as well as your doubts. You can find these important questions free of cost on the Vedantu website. Worksheets of this Chapter are also helpful.
5. Why is Vedantu beneficial for studying Chapter 4 of Class 7 Science?
The following points will let you know why Vedantu is beneficial for studying Chapter 4 of Class 7 Science:
It is one of the best learning online platforms.
You will find all the study materials for Chapter 4 of Class 7 Science.
The teachers hired by Vedantu are well qualified.
The dialect used for writing the content is easy to understand.
It helps in preparing for your examination.
Students can ask their doubts from the teachers.
6. What role do indicators play in identifying acids and bases, according to Chapter 4 of Class 7 Science by Vedantu?
Indicators are substances that change colour when added to acids or bases. For instance, litmus paper turns red in an acidic solution and blue in a basic solution. This helps us quickly determine the nature of a substance. Understanding indicators is crucial for experiments and daily life.
7. How do acids and bases react with metals, as explained in Vedantu’s Important Questions for Chapter 4 of Class 7 Science?
Acids react with certain metals to produce hydrogen gas and a salt. For example, when hydrochloric acid reacts with zinc, it produces zinc chloride and hydrogen. Bases, on the other hand, do not typically react with metals in the same way. This knowledge is important in both chemistry and industry.
8. What are some everyday uses of acids, based on Chapter 4 of Class 7 Science according to Vedantu’s Important Questions?
Acids have various everyday uses. For example, citric acid is found in lemons and is used in cooking and preserving food. Sulphuric acid is used in car batteries. Learning about these uses helps us appreciate the role of acids in our daily lives. Understanding these applications is part of the curriculum in Class 7 Science.
9. Why is it important to study salts, according to Vedantu’s Important Questions for Chapter 4 of Class 7 Science?
Salts are vital for many biological and chemical processes. For instance, table salt (sodium chloride) is essential for human health. Salts also play a role in agriculture and food preservation. By studying salts, students learn about their significance in various fields. This knowledge enhances their overall understanding of chemistry.
10. How can neutralisation help in treating soil, as mentioned in Vedantu’s Chapter 4 of Class 7 Science?
Neutralisation can help balance the pH of soil. If the soil is too acidic or too basic, it can harm plant growth. Adding lime can neutralise acidic soil, while adding sulphur can help basic soil. This concept is essential for farmers and gardeners to ensure healthy crops. Understanding this process connects science to agriculture.
11. What is the significance of understanding pH levels, based on Chapter 4 of Class 7 Science Vedantu’s Important Questions?
pH levels indicate how acidic or basic a solution is, ranging from 0 to 14. A pH of 7 is neutral, below 7 is acidic, and above 7 is basic. Knowing the pH helps us understand the properties and behaviour of substances. It’s important in various fields, including chemistry, biology, and environmental science.
12. How does Vedantu’s Chapter 4 of Class 7 Science explain the effects of acid rain?
Acid rain occurs when pollutants mix with rainwater, making it acidic. This can harm plants, soil, and buildings by corroding materials. Understanding the effects of acid rain helps students appreciate environmental issues. It raises awareness about pollution and its consequences on nature.
13. What are some practical experiments related to acids and bases from Vedantu’s Important Questions for Chapter 4 of Class 7 Science?
Students can conduct simple experiments, like testing different household liquids with litmus paper to see if they are acidic or basic. They can also mix vinegar and baking soda to observe a reaction. These hands-on activities make learning fun and reinforce scientific concepts. Experiments are a key part of science education.
14. Why should students refer to Vedantu for Chapter 4 of Class 7 Science?
Vedantu offers a wealth of resources for Chapter 4, including important questions and detailed explanations. Students can access study materials that simplify complex concepts. The platform also provides interactive learning experiences, making it easier to understand acids, bases, and salts. This support is beneficial for exam preparation.
15. How can important questions help students excel in Chapter 4 of Class 7 Science at Vedantu?
Studying important questions helps students focus on key topics and understand their applications. It reinforces learning by allowing students to practise and review essential concepts. By doing so, they gain confidence and are better prepared for tests. This targeted approach is effective in mastering the chapter.
