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JEE Main - Hydrogen Notes (Free PDF Download)

Last updated date: 23rd May 2024
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Download Hydrogen Notes With Important Topics: Score High Marks In JEE Main 2025

Get ready to reach your success in JEE Main 2025 with Hydrogen Notes that focus on important topics. These notes are your key to achieving high marks in JEE Main exams. These revision notes are made by master teachers at Vedantu, who know just what you need. These notes are in the compact form of  Hydrogen and cover everything you should know about the exam. Best part? You can download them for FREE in PDF format.


JEE Main Revision Notes


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JEE Main

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Chapter-wise Notes with PDF

Hydrogen covers the elemental properties and significance of hydrogen, the most abundant element in the universe, and they are some of the important topics for JEE Main exams. Check out the table below for more information. 

Year Wise Weightage of Questions: JEE Main Hydrogen

Sl. No.


Average No. Of MCQs Asked

Marks per Question

Total Marks





















To reach your goals, prepare for your JEE Main 2025 exams using Vedantu’s Hydrogen Notes PDF and the JEE Main Chemistry Syllabus 2025.

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JEE Main 2025: What to Focus on Hydrogen?

A few topics in the Hydrogen will help you score in JEE Main 2025. Knowing the list of those topics will make it easy for you to prepare and focus on the JEE Mian exam.  You can check the list of important topics from the Hydrogen below. Unravel the key concepts, fundamental theories, and vital formulas shaping your success in Hydrogen for JEE Main 2025.

  • Isotopes of Hydrogen

  • Preparation and Properties of Hydrogen Gas

  • Hydrides: Ionic, Covalent, and Metallic

  • Water: Structure, Properties, and Hardness

  • Heavy Water and its Uses

  • Hydrogen Peroxide: Preparation and Properties

  • Uses of Hydrogen in Industry

  • Hydrogen as a Fuel

  • Liquid Hydrogen as a Cryogenic Agent

  • Hydrogen Economy and Sustainable Energy

Easy Access to JEE Main Chemistry Notes: Chapter-wise Links for 2025

Easily enhance your JEE Main Chemistry preparation for 2025 with our chapter-wise notes. Get The links from the table below:

Why Hydrogen Notes are Important In JEE Main Preparation? 

Hydrogen is the lightest and most abundant element in the universe. It exhibits diverse roles, from forming compounds with various elements to being a crucial component of water. The hydrogen Chapter holds a significant importance of about 2.6% in the JEE Main. Expect direct questions from this part, making it a scoring section. Let's explore why this chapter holds such importance:

Chapter Overview:

Welcome to the captivating world of Hydrogen, a fundamental chemistry chapter that's as abundant as it is intriguing! From its role in the universe to its diverse applications, this chapter takes you on an interactive exploration of one of the most essential elements.

Why Hydrogen Matters:

Imagine a universe without stars, water, or fuel cells powering green energy! Hydrogen plays an irreplaceable role in all these realms and more. Whether it's giving stars their fiery brilliance or being a vital ingredient in water molecules, hydrogen's influence is boundless.

Hydrogen in the Cosmos:

Discover how hydrogen's simplicity hides its cosmic significance. Dive into the story of the Big Bang and understand how hydrogen was the first element to form in the universe. Stars owe their existence to hydrogen, fusing it to create energy and crafting elements that make up our world.

Hydrogen Bonds and Water:

Unravel the mystery of hydrogen bonds - the tiny forces that hold water molecules together and give water its unique properties. From life-sustaining hydration to the awe-inspiring dance of water's surface tension, hydrogen bonds shape the world around us.

Hydrogen as an Element:

Learn about hydrogen's different isotopes and its placement in the periodic table. Delve into the concept of atomic and molecular hydrogen, laying the foundation for more advanced topics in chemistry.

Hydrogen's Future:

Explore the exciting world of hydrogen as a clean and versatile energy carrier. Discover how fuel cells, powered by hydrogen, can revolutionize transportation and provide sustainable energy solutions for the future.

Interactive Learning:

Embark on interactive quizzes and engaging visual aids to solidify your understanding. Dive into hands-on activities that bring the concepts to life, making learning a dynamic and enjoyable experience.

JEE Main Journey with Hydrogen:

Your journey into the captivating world of hydrogen isn't just about mastering a chapter; it's about embracing an element that shapes the universe, fuels innovation, and promises a cleaner future. So, let's dive in together and unravel the endless possibilities that hydrogen offers!

Experiment Time:

Gather a few everyday items like balloons and a lit candle. Discover firsthand the flammable properties of hydrogen as you conduct a mini-experiment at home. Remember, science is all about exploration!

Hydrogen isn't just an element; it's a gateway to understanding the intricacies of our universe and the exciting frontiers of modern science. So, fasten your seatbelt, get ready to embark on this adventure, and let's unlock the wonders of hydrogen together!

Hydrogen Formulas to Learn with Notes

JEE Main formulas are important for doing well in the exam. Using them with organized revision notes becomes useful for understanding everything well. While you go over your JEE Main notes, include the related formulas. First, understand why the formula is used by looking at the notes, and then try it on practice problems. This mix helps you understand better, remember more, and get better at solving problems. These are all very important for doing great in JEE Main 2025. You can get the essential JEE Main Chemistry Formula PDF for free from Vedantu’s website and get higher scores in your JEE Main 2025 Exams.

Important Formulas from Hydrogen

1. Rydberg Formula: 

\[ \frac{1}{\lambda} = R \left( \frac{1}{n_1^2} - \frac{1}{n_2^2} \right) \]

2. Energy Levels of Hydrogen Atom: 

\[ E_n = -\frac{2.18 \times 10^{-18}}{n^2} \]

3. Ionization Energy: 

\[ \text{Ionization Energy} = -E_1 = \frac{2.18 \times 10^{-18}}{n^2} \]

4. De Broglie Wavelength: 

\[ \lambda = \frac{h}{mv} \]

5. Heisenberg's Uncertainty Principle: 

\[ \Delta x \cdot \Delta p \geq \frac{h}{4\pi} \]

6. Schrödinger Equation for Hydrogen Atom: 

\[ -\frac{\hbar^2}{2\mu} \nabla^2 \psi + V \psi = E \psi \]

7. Magnetic Quantum Number $(m_l)$: 

\[ -l \leq m_l \leq l \]

8. Spin Quantum Number $(m_s)$: 

\[ m_s = \pm \frac{1}{2} \]

Next-Level Preparation: Supplemental Links for JEE Main 2025 Hydrogen

These extra resources will elevate your preparation for JEE Main 2025 Hydrogen. These links go beyond the basics to provide more learning materials. They're like stepping stones to higher understanding. As you delve into these supplementary links, you'll explore deeper aspects of the chapter. This added knowledge can help you solve complex problems and tackle challenging questions. These links are your secret tools to boost your confidence and excel in your exam. Check out the links in the table below and take your JEE Main 2025 Hydrogen preparation to the next level.

Achieve Success through Vedantu’s JEE Main Notes

As you aim for success in your exams, rely on Vedantu's Hydrogen JEE Main Notes. We stand out with our special way of teaching that combines expert help and easy-to-use materials. Our detailed revision notes make tough ideas easy, making your preparation better. And guess what? You can get these helpful resources as FREE PDFs. Count on Vedantu to support you as you work towards excelling in your exams. Improve your learning, make studying easier, and achieve success with Vedantu.

FAQs on JEE Main - Hydrogen Notes (Free PDF Download)

1. What are the most important topics included in Hydrogen Notes for JEE Main 2025?

The following crucial subjects are covered in the Hydrogen Notes for JEE Main 2025:

  • Position of Hydrogen in the Periodic Table

  • Isotopes of Hydrogen

  • Preparation and Properties of Dihydrogen

  • Hydrides: Ionic, Covalent, Metallic, and Intermolecular

  • Water: Structure, Properties, and Uses

  • Heavy Water and its Uses

  • Hydrogen Peroxide: Preparation, Properties, and Uses

  • Hydrogen as a Fuel

  • Hydrogen Economy and Sustainable Energy

2. What is the weightage of Hydrogen Notes for JEE Main 2025?

The weightage of the Hydrogen chapter in JEE Main 2025 is around 2.8%. This means that there is typically 1 question asked from this chapter.

3. Which is the easiest topic of JEE Main 2025 Hydrogen Notes?

The Atomic Structure and Hydrogen topic is often considered one of the easier topics in JEE Main Chemistry. It covers concepts related to the atomic structure, electronic configuration, and properties of hydrogen, making it relatively straightforward for students to grasp.

4. What are the Hydrogen in the context of JEE Main 2025?

In the context of JEE Main (Joint Entrance Examination Main), Hydrogen refers to a topic covered in the chemistry section of the exam. It focuses on the properties, atomic structure, bonding, and reactions of hydrogen gas. Understanding hydrogen is essential for students preparing for JEE Main, a competitive engineering entrance exam in India.

5. How can I apply Hydrogen to solve JEE Main problems?

To apply hydrogen to solve JEE Main problems, understand its concepts thoroughly, including atomic structure and chemical reactions. Utilize hydrogen-related questions from previous papers, practice tests, and reference materials. Apply principles to solve problems involving hydrogen's behavior, reactions, and properties to enhance your preparation for the JEE Main exam.

6. Are there any common mistakes students make in Hydrogen problems?

Common mistakes students make in hydrogen problems include forgetting to account for the quantum numbers in energy level calculations, neglecting the repulsion between electrons, misapplying the Bohr model, and overlooking the distinction between atomic and molecular hydrogen in spectroscopy. Additionally, incorrect assumptions about electron placement can lead to errors.

7. Are there any online resources for additional practice with the Hydrogen for JEE Main 2025?

Vedantu websites offer practice problems, quizzes, and video tutorials on the Hydrogen. These resources can help reinforce your understanding and problem-solving abilities.

8. How can I make my own JEE Main Hydrogen notes?

Here are some tips on how to make your own JEE Main Laws of Motion notes:

  • Start by reading your textbook or a good online resource on the Laws of Motion.

  • Take notes on the important concepts and formulas.

  • Organize your notes in a way that makes sense to you.

  • Add diagrams and illustrations to help you understand the concepts.

  • Practice solving problems from your notes.