Chapter 11. Hydrogen - JEE Main - Core Points for Revision

Importance of  Core Revision Points: Core Revision Points are important because if you remember them strongly, many more points related to them will come out of your memory and help you to answer question and problems. Read them many times and make sure you remember them very strongly.


Revision Points in the Sections in the Chapter - Jauhar

1. Unique position of hydrogen in the periodic table
Hydrogen is the only element which does not have neutrons in the nucleus.
Hydrogen resembles alkali metals as well as halogens in its properites.

2. Occurrence of hydrogen


3. Isotopes of hydrogen
4. Dihydrogen

5. Hydrides

6. Water

7. Heavy Water
Heavy water is D2O. It is used in nuclear reactors as moderator.

8. Hard and Soft Water

Calgon process is the most modern method of the softening of water.


9 Hydrogen Peroxide
Strength of hydrogen peroxide is usually expressed as volume. A 20 volume of H2O2 means that l litre of this solution will give 20 litres of oxygen at N.T.P.

10 Liquid Hydrogen as a Fuel
Liquid hydrogen has been used as an important rocket fuel.

11 Hydrogen Economy



Sections in the Chapter - Jauhar

1. Unique position of hydrogen in the periodic table
2. Occurrence of hydrogen
3. Isotopes of hydrogen
4. Dihydrogen
5. Hydrides
6. Water
7. Heavy Water
8. Hard and Soft Water
9 Hydrogen Peroxide
10 Liquid Hydrogen as a Fuel
11 Hydrogen Economy


Updated on 2 January 2020

21 May 2015

IIT JEE - Study Guide - Study Plan Chapter 11. Hydrogen

Sections in the Chapter - Jauhar

1. Unique position of hydrogen in the periodic table
2. Occurrence of hydrogen
3. Isotopes of hydrogen
4. Dihydrogen
5. Hydrides
6. Water
7. Heavy Water
8. Hard and Soft Water
9 Hydrogen Peroxide
10 Liquid Hydrogen as a Fuel
11 Hydrogen Economy


Conceptual Questions with Answers: 16
Additional Numerical Problems for Practice:
Revision Exercises
Very Short Answer questions 25
Short Answer Questions 50
Long Answer Questions 14

Competition File
Numerical Problems
Objective Questions: 25
Fill in the blanks: 5
True or False: 5

Study Plan

Day 1

1. Unique position of hydrogen in the periodic table
2. Occurrence of hydrogen
3. Isotopes of hydrogen

Day 2

4. Dihydrogen
Practice Problems 11.1 to 11.10

Day 3

5. Hydrides

Day 4

6. Water
7. Heavy Water
8. Hard and Soft Water


Day 5
PP. 11.11 to 11.17

9 Hydrogen Peroxide

Day 6
PP. 11.18 to 11.25

10 Liquid Hydrogen as a Fuel
11 Hydrogen Economy

Day 7

Conceptual Questions with Answers: 16

Revision Exercises: Very Short Answer questions 25

Day 8
Short Answer Questions 50

Day 9

Competition File

Objective Questions: 25
Fill in the blanks: 5
True or False: 5

Day 10
Concept Revision

Revision Period

Day 11 to Day 20
Revision and test paper problem solving