Chemistry notes for class 12

Chemistry notes for class 12

CBSE Chapter Notes for all chapters of Class 12th Chemistry are available here. These notes are based on Class 12 NCERT textbooks and latest CBSE class 12th Chemistry Alakh pandey notes syllabus 2019 - 2020. These important notes are very useful for revision purpose before CBSE class 12th Physics board exam 2020. There are total 15 chapters in Class 12th Chemistry NCERT textbook. The alakh Pandey hand written Notes in hindi. Chemistry notes 6 class 12 weightage of each chapter in CBSE Class 12 Chemistry board exam 2020 is given in the latest CBSE Class 12th Chemistry Syllabus 

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These notes are very important for CBSE Class 12 Chemistry board exams.

CBSE Chapter Notes for all chapters of Class 12th chemistry are available here. These notes are based on Class 12 NCERT textbooks and latest CBSE class 12th chemistry syllabus  2021 - 2022. These important notes are very useful for revision purpose before CBSE class 12th chemistry board exam 2022 There are total 15 chapters in Class 12th chemistry NCERT textbook. The weightage of each chapter in CBSE Class 12 chemistry board exam 2022 is given in the latest CBSE Class 12th  Syllabus 

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Chemistry notes for class 12

These notes are very important for CBSE Class 12 chemistry board exams.

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• Chapter 1 The Solid State
• Chapter 2 Solutions
• Chapter 3 Electro chemistry
• Chapter 4 Chemical Kinetics
• Chapter 5 Surface Chemistry
• Chapter 6 General Principles and Processes of Isolation of Elements
• Chapter 7 The p Block Elements
• Chapter 8 The d and f Block Elements
• Chapter 9 Coordination Compounds
• Chapter 10 Haloalkanes and Haloarenes
• Chapter 11 Alcohols Phenols and Ethers
• Chapter 12 Aldehydes Ketones and Carboxylic Acids
• Chapter 13 Amines
• Chapter 14 Biomolecules
• Chapter 15 Polymers
• Chapter 16 Chemistry in Everyday Life

Students your final exams are just around the corner. Students are busy with their last minute revisions and trying to get the most out of their study hours these days.

But you do not need to panic as out the team of experts at Meritnation has come up with some great insights into each chapter for your Chemistry exam. These key revision points and quick tips will help you prepare intelligently for the exams. Even if you have left out certain chapters for last minute preparations or revisions, these tips will help you get through them better.

• Chapter 1 The Solid State

Important Topics:

1. Number of octahedral voids = Number of atoms and Number of tetrahedral voids = Twice the number of atoms

2. For unit cell dimension the important formula is M = dNaa3/ z

3. Imperfections in solids:

MERITNATION TIPS:

a) Do read the definitions given in the NCERT book for the terms Pseudo solids or Supercooled liquids, isotropic and anisotropic solids, molecular solids, Bravais lattice.

b) For predicting formulae of compounds you need to revise the total number of atoms per unit cell. For simple cubic unit cell it is 1, For bcc it is 2 and for fcc it is 4.

• Chapter 2 Solutions

Important Topics:

1. Raoult’s law

2. Dalton’s law of partial pressure

3. Henry’s law

4. Mass % = (Mass of component in solution/ Total mass of the solution) ✕ 100

5. Volume % = (Volume of component in solution/ Total volume of the solution) ✕ 100

6. ppm = (No. of parts of the component/ Total no. of parts of all components of solution) ✕100

7. Mole fraction = No. of moles of component/ Total no. of moles of all components

8. Molarity = (Moles of solute/ volume of solution in litres)

9. Molality = Moles of solute/ Mass of solvent in kg

10. Relative Lowering of vapour pressure

11. Elevation of boiling point

12. Depression of freezing point

13. Osmosis and Osmotic Pressure

14. Van’t Hoff Factor

15. Important graphs:

• Chapter 3 Electro chemistry

Important Topics:

1. Type of cells:

     a) Electrochemical cell / Galvanic cell

     b) Electrolytic cell

2. Electrode potential

3. Standard electrode potential 

4. Anode 

5. Cathode

6. Cell potential 

7. Cell electromotive force (emf)

8. SHE (Standard Hydrogen Electrode)

9. Nernst equation

10. Relation between cell potential and Gibbs energy:

11. Relation between equilibrium constant and Gibbs energy

12. Resistance(R)

13. Resistivity

14. Specific conductance/Conductivity

15. Molar conductivity

16. Molar Conductivity for Strong Electrolytes

17. Molar Conductivity for Weak Electrolytes

18. Kohlrausch law of independent migration of ions

19. Faraday’s law of electrolysis

20. Types of electrodes

     a) Inert

     b) Active

21. Batteries:

     a) Primary 

     b) Secondary

22. Corrosion 

23. Hydrogen Economy

• Chapter 4 Chemical Kinetics

Important Topics:

1. First Order Reaction Kinetics

2. Arrhenius Equation

3. Order and Molecularity

• Chapter 5 Surface Chemistry

Important Topics:

1. Distinction between adsorption and absorption

2. Types of Adsorption

3. Freundlich adsorption isotherm

     a) Adsorption from Solution Phase

4. Colloids

5. Emulsions

INORGANIC CHEMISTRY

• Chapter 6 General Principles and Processes of Isolation of Elements

Important Topics:

1. Metallurgy 

2. Ellingham Diagram

3. Mond process for refining nickel

4. Van Arkel Method for refining zirconium or titanium

• Chapter 7 The p Block Elements

Important Topics:

1. Inert pair effect

2. Disproportionation

3. Non-metallic hydrides

4. Colour of halogen compounds

5. Non-metallic halides

6. Catenation

7. Interhalogen compounds

8. Structures of Oxoacids: Phosphorus and Sulphur

9. Structures of Fluoride: Sulphur, xenon, bromine

10. Basicity of group 15 elements

11. Structures of PCl5, H2SO3, H2SO4, H2S2O8, H2S2O7, HOCl, HClO2, HClO34, N2<O5, XeOF4

• Chapter 8 The d and f Block Elements

Important Topics:

1. d-Block elements

2. f-Block elements

3. Actinoid

4. Lanthanoid Contraction

5. Actinoid Contraction

• Chapter 9 Coordination Compounds

Important Topics:

1. Coordination Compounds 

2. Coordination Entity 

3. Central Atom or Ion

4. Ligands

5. Coordination Number

6. Coordination Sphere

7. Coordination Polyhedron

8. Oxidation Number of Central Atom

9. Homoleptic complexes

10. Heteroleptic complexes

11. Werner’s theory

12. Valence bond theory

13. Crystal-field theory

ORGANIC CHEMISTRY

(Chapter 10 to Chapter 16)

Important Topics:

1. IUPAC Nomenclature questions 

2. Name reactions: Important name reactions which have been asked pre

NEW DELHI: Board exams are going on. The students, who are appearing for CBSE Class 10th and 12th exams are nervous and busy in giving final preparation to their respective papers. Today we are talking about the upcoming class 12th Chemistry paper which is going to be held on Tuesday, March 13, 2018, from 10:30 am to 1:30 pm.

Chemistry is considered to be the second difficult subject after Physics as it involves lots of learning and understanding. Some students fail to score good in Chemistry and the major reason behind this is the fear from chemistry. Also, the syllabus for chemistry is huge. Basically, science subject needs all three - sharp mind (logical), good memory power (to learn and remember the topics) and stamina (for studying long hours), especially the Chemistry subject demands repeated readings of the textbooks and notes.

Our advice is to the students to get rid of the chemistry-phobia from their minds. Chemistry is one of the easy subjects of Science stream if you concentrate and practice consistently the topics and practice solving numericals.

As the CBSE Class XII Chemistry exam is to take place on Tuesday, here we are with few tips about you can better prepare yourself for the exam. All the best!

Prepare intelligently

CBSE Class 12 Chemistry syllabus is divided into three parts - Physical Chemistry, Organic Chemistry and Inorganic Chemistry. Physical Chemistry has five chapters and is of 23 marks, Organic Chemistry has four chapters of 19 marks and Inorganic Chemistry has seven chapters of 28 marks.

Chapters of Physical Chemistry are relatively easier to understand and you can memorise it easily, so revise this portion of the syllabus first and then take organic chemistry and in the end, learn and practice inorganic chemistry.

Most Important tips for Chemistry paper

1) Most important topics for reasoning such as the 'P, d & f block elements'

2) Topics which carry maximum questions/marks: Molar mass determination, Raoult's Law, Adsorption isotherm and Packing fraction

3) Practice solving numericals from the chapters like Physical chemistry, Organic and Inorganic chemistry

4) Solve past papers and latest sample papers

5) Prepare for the conceptual questions on numerical

6) The last three chapters - Polymers, Bio-molecules and Chemistry in Everyday - are the simplest ones and carry 10 marks, prepare them first for the exam

7) After the above-mentioned topics, do whatever you can in order to command over the 'p-Block Elements' as it carries 8 marks

8) And then prepare "Surface Chemistry" as 3 to 4 questions asked from this topic.

Not to worry about the chapters you have not prepared or even touched as most of the chapters are of 3 to 4 marks only. Forget about those chapters, don't read them now.

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CBSE Class 12 Syllabus for Organic

 Chemistry and marks

S. No. Chapter Marks

1 Haloalkanes and Haloarenes 4

2 Alcohols, Phenols and Ethers 4

3 Aldehydes, Ketones and Carboxylic Acids 6

4 Amines 4

5 Biomolecules 4

6 Polymers 3

7 Chemistry in Everyday Life 3

CBSE Class 12 Syllabus for Inorganic Chemistry and marks

S. No. Chapter Marks

1 p- block Element 8

2 d- and f- block Elements (Transitions Elements) 5

3 General Principle and Process of Isolation of Elements 3

4 Co-ordination Compound 3

CBSE Class 12 Syllabus for Physical Chemistry and marks

S. No. Chapter Marks

1 Solid State 5

2 Solutions 5

3 Electrochemistry 5

4 Chemical Kinetics 5

5 Surface Chemistry 4

CBSE Sample paper for Class 12th

 Chemistry

Chemistry (Theory)

Warm up your brain and show the world how exceptionally wonderful you are. Wishing you the best of luck! Dear darling, you can achieve anything you heart desires providing you don't lose faith in your remarkable abilities. May God bless you with the courage to never lose faith in yourself in the examination hall.

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