Revision Notes for Class 11 Chemistry Chapter 9 - Hydrogen - Free PDF Download
Class 11, chapter 9, deals with the topic of Hydrogen is basically structured in a manner to help the students to know everything about the element in full detail. By studying the Hydrogen chapter, students will know about its isotopes, properties, reactions, the position of hydrogen in the periodic table, and the other important topics. Therefore, to help the students become familiar with these topics and understand them clearly, CBSE revision notes for Chemistry Class 11 Chapter 9, hydrogen is provided here, at Vedantu. Students can download the revision notes seemingly in the form of a PDF file and use them as an effective reference tool to complete their revisions in time, prepare well, and fetch higher grades in the final exams.
FAQs on Hydrogen Class 11 Notes CBSE Chemistry Chapter 9 [Free PDF Download]
1. List out some uses of H2?
Let us look at the uses of the hydrogen compound, as listed below.
It is used as a rocket fuel due to its high calorific value.
Oxy Hydrogen Flame is used for welding purposes.
It also helps in the synthesis of HNO3 (nitric acid), NH3 (ammonia), HCl (hydrochloric acid), and more.
It helps in the synthesis process of the vanaspati ghee.
It is completely a reducing agent.
2. Explain the physical properties of Hydrogen?
Some of the physical properties of hydrogen can be given as:
Hydrogen is colorless, tasteless, and odorless
It has a vapor density of 1, which is lighter than air
It is also non - poisonous
The solubility of the compound in H2O is very low
3. List out some important points on the Revision Notes?
Manage their time effectively and efficiently
Incorporate all the topics and subtopics that fall under the Hydrogen before going to the exams
Plan the timetable in terms of preparation according to the topic count, size of the topics, and more related
4. Where can I download the latest or previous year’s papers of my academic stuff?
You can download the question papers, revision notes, last 5 years papers, and other related information concerning the academics from India’s largest online learning platform, Vedantu. It is also quite easy to download the required papers from the site, simply using the search option available on the website.
Students can also download the same files from the respective official websites of the state board.
5. What topics does Chapter 9 of Class 11 Chemistry consist of?
The topics that Chapter 9 of Class 11 Chemistry consists of are:
Hydrogen having a position in the Periodic Table.
Preparation of Dihydrogen
Characteristics of Dihydrogen
Water and its Forms and Structure
Use of Dihydrogen as a Fuel
In this chapter, you will learn about the element “Hydrogen” including its properties, isotopes, position, reactions, etc. This chapter is theoretical so students can easily prepare this chapter for their examination.
6. How can students prepare Chapter 9 for their Class 11 Chemistry examination?
The given study plan can help students to prepare Chapter 9 for their Class 11 Chemistry exam:
Study the Chemistry NCERT book thoroughly to understand the chapter.
Prepare the notes of the chapter so that you can remember the important points.
Solve NCERT questions of this chapter to get the hint about the questions asked in the exam.
Work out on various sample papers to comprehend the concepts easily.
Go through different guidebooks or reference books for more information about the chapter and to clarify your doubts.
The study material for students is available on the Vedantu website and Vedantu app at free of cost.
7. Write the differences between hard water and soft water.
(a) Hard Water:
Hard water is abundant in minerals.
No formation of lather when this water is used with soap.
It contains calcium and magnesium ions.
Using this water, skin and hair becomes dry.
(b) Soft Water:
This water includes only a few elements.
Lather forms when soap is used with this water.
There are sodium ions in this water.
By utilizing this water, skin and hair becomes soft.
Example – rainwater
8. Why is water regarded as a good solvent for polar or ionic substances?
The molecules of water are highly polar in nature. When ionic substances are mixed in water then a large amount of hydration energy is released. This energy is more than that of the energy required to break the molecules of water. Therefore, high hydration energy results in the solvation of ionic substances in water.
In the case of polar substances, the energy released when water interacts with polar molecules is sufficient to break the water molecules or molecules of polar substances. This results in a mixture of water and polar substances.
9. List some characteristics and applications of dihydrogen.
Some characteristics and applications of dihydrogen are:
The dihydrogen exists as a gas at STO
-259.16 degrees Celsius is the melting of the dihydrogen.
20.271 K is the boiling of the dihydrogen.
0.904 kilojoules per mole is the latent heat of fusion of the dihydrogen.
In the manufacture of vanaspati fat, dihydrogen is used.
As it has high calorific value, it is used as rocket fuel.
In Haber's process, dihydrogen is used in the synthesis of ammonia.
Hydrogen chloride is made by using dihydrogen.