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NIOS Class 12 Chemistry — Revision Notes

NIOS Class 12 Chemistry revision notes, chapter by chapter across 8 chapters. Follows the NIOS syllabus. Starts with Atomic Structure, Periodic Table.

How to Revise Effectively

  • Active recall: cover the notes, try to recall the key points, then check.
  • Spaced repetition: revise each chapter again after a day, then after a few days, then after a week or two.
  • Write, don't just read: writing key points and formulas out by hand helps them stick.
  • Teach someone: explaining an idea to a friend is a good test of whether you understand it.

Chapter-Wise Revision Notes — 8 Chapters

1

Atomic Structure

4 topics
  • 1. Fundamental Particles of the Atom
  • 2. Atomic Number, Mass Number, Isotopes, and Isobars
  • 3. Earlier Models of the Atom
  • 4. Electromagnetic Radiation and Photon Energy
All atoms consist of three fundamentalAtomic number (Z) is the numberIsotopes are atoms of the sameJErnest Rutherford bombarded thin gold foil
Read the Atomic Structure notes
2

Periodic Table and Periodicity in Properties

4 topics
  • Early Attempts at Classification of Elements
  • Mendeleev's Periodic Table
  • Modern Periodic Law and Long Form of the Periodic Table
  • IUPAC Nomenclature for Elements with Atomic Number > 100
Dobereiner discovered that certain elements couldJohn Newlands arranged elements in orderDmitri Mendeleev arranged elements by increasingIn 1913The modern periodic table perfectly matches
Read the Periodic Table and Periodicity in Properties notes
3

Chemical Bonding

4 topics
  • 1. Fundamental Concepts of Chemical Bonding
  • 2. Ionic or Electrovalent Bonding
  • 3. Covalent Bonding
  • 4. Bond Polarity and Dipole Moment
Valence electrons are the electronsAn ionic bond forms when oneA covalent bond forms when twoA coordinate covalent bond forms whenBond polarity arises when two bonded
Read the Chemical Bonding notes

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Frequently Asked Questions

Where can I find NIOS Class 12 Chemistry Revision Notes?

This page has revision notes for 8 chapters of NIOS Class 12 Chemistry for the board exams 2027. Each chapter links to its own page with the full set.

Go through the syllabus first, then work chapter by chapter: learn the ideas, practise questions, and revise with notes and flashcards. Leave time at the end to revise every chapter once more under timed conditions.

Browse Revision Notes by Chapter

8 chapters

1

Atomic Structure

2

Periodic Table and Periodicity in Properties

3

Chemical Bonding

4

The Gaseous And Liquid State

5

The Solid State

6

Colloids

7

Chemical Thermodynamics

8

Spontaneity Of Chemical Reactions

More Chemistry Resources

NIOS Class 12

Practice Quiz

Test yourself with quick quizzes

Important Questions

Exam-style questions with answers

Formula Sheet

The formulas of each chapter in one place

Chapter Summary

Understand each chapter at a glance

Concept Maps

Diagrams showing how topics connect

Flashcards

Quick-fire cards for active recall practice

Syllabus

Chapter list and the topics in each

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