# NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrogen

NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrogen

Hydrogen is the simplest and most abundant element in our universe.  In this chapter, we will learn about hydrogen element, its occurrence, its position in the periodic table, dihydrogen, preparation and properties of dihydrogen, hydrides etc. And also discuss the isotopes of hydrogen, how they are prepared and its properties. This is an important chapter for class 11 students because many questions asked in CBSE class 11 final examination and competitive exams. In this chapter, there are  36 questions in the exercise. The NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrogen are designed by our chemistry experts. These NCERT solutions help students in the preparation of their class 11 final examination as well as in the various competitive exams like JEE Mains, NEET, etc.

Hydrogen is the most abundant element in our universe (more than 80% of the universe) and also the 3rd most abundant element after oxygen and silicon on the surface of the globe. Therefore it is important to know all about the hydrogen element for a chemistry student. Hydrogen is being visualized as the major future source of energy. After completing NCERT Class 11 Chemistry Chapter 9 Hydrogen students will be able to explain the position of hydrogen in the periodic table; describe isotopes of hydrogen; able to explain how different elements combine with hydrogen to form, molecular, ionic and non-stoichiometric compounds; understand the structure of water, hydrogen peroxide, etc.

Important points of NCERT Class 11 Chemistry Chapter 9 Hydrogen-

1. Hydrogen is the 1st element in the periodic table. Its electronic configuration is $\dpi{100} 1s^1$. Its electronic configuration is similar to the electronic configuration of two groups which are alkali metals $\dpi{100} (ns^1)$ and halogens $\dpi{100} (ns^2np^5)$.

2. Hydrogen shows dual nature because it behaves as electropositive like alkali metals and electronegative like halogens.

3. Hydrogen exists in three isotopes which are $\dpi{100} _{1}^{1}\textrm{H}$ (protium), $\dpi{100} _{1}^{2}\textrm{H}$ or D (deuterium), and $\dpi{100} _{1}^{3}\textrm{H}$ or T (tritium).

4. Three main sources from which dihydrogen may be prepared are (i) Water, (ii) Acids and (iii) Alkalies.

5. Dihydrogen is an odourless, colourless, and tasteless gas.

Topics of NCERT Grade 11 Chemistry Chapter 9 Hydrogen

9.1 Position of Hydrogen in the Periodic Table

9.2 Dihydrogen, $\dpi{100} H_2$

9.3 Preparation of Dihydrogen, $\dpi{100} H_2$

9.4 Properties of Dihydrogen

9.5 Hydrides

9.6 Water

9.7 Hydrogen Peroxide $\dpi{100} (H_2O_2)$

9.8 Heavy Water, $\dpi{100} D_2O$

9.9 Dihydrogen as a Fuel

## NCERT Solutions for Class 11 Chemistry Chapter 9 Hydrogen- Exercise Questions

View all NCERT exercise solutions for class 11 chemistry chapter 9 Hydrogen here

NCERT Solutions for class 11 Chemistry

 Chapter-1 Some basic concepts of Chemistry Chapter-2 Structure of Atom Chapter-3 Classification of Elements and Periodicity in Properties Chapter-4 Chemical Bonding and Molecular Structure Chapter-5 States of Matter Chapter-6 Thermodynamics Chapter-7 Equilibrium Chapter-8 Redox Reaction Chapter-9 Hydrogen Chapter-11 The P-Block Elements Chapter-12 Organic chemistry- some basic principles and techniques Chapter-13 Hydrocarbons Chapter-14

## NCERT Solutions for Class 11- Subject wise

 NCERT solutions for Class 11 Biology NCERT solutions for Class 11 Maths NCERT solutions for Class 11 Chemistry NCERT solutions for Class 11 Physics