Important Definitions in Chemistry Class 12 to Score High

Class XII Board exams are approaching. All candidates must have prepared well for the upcoming exam. For many students, Chemistry seems to be a challenging subject to study and their fear doubles when it’s the time for Board exam preparation. Do you know a major chunk of 1/2 marks questions in Board Papers comprise of some important definitions or terms? These definitions may also be asked in combination with examples that may carry five marks each. Hence, it is necessary for every candidate to revise these definitions before going to the exam. You should write them all and revise them accurately if you wish to score high in your Boards. Here, we are providing a list of most important definitions/ terms in Chemistry that you must not forget to brush up before entering the examination hall.

Important – CBSE Sample Paper Class 12 Download

Most Important Definitions in Chemistry 

Unit 1: The Solid State

1. Ferromagnetism
2. Frenkel defects
3. Schottky defects

Unit 2: Solutions

1. van’t Hoff factor
2. Mole fraction
3. Colligative properties
4. Henry’s law

Unit 3: Electrochemistry

1. Conductivity
2. Molar Conductivity
3. Kohlrausch law
4. Faraday’s Laws of Electrolysis

 Unit 4: Chemical Kinetics

1. Activation energy of a reaction.
2. Rate of a reaction
3. Molecularity of a reaction

You will also like: How to Learn Chemical Reactions Like A Pro!

Unit 5: Surface Chemistry

1. Electrophoresis
2. Tyndall effect
3. Peptization
4. Aerosol
5. Emulsion

 Unit 6: General Principles and Processes of Isolation of Elements

1. Pyrometallurgy
2. Froth Floatation
3. Zone refining
4. Electrolytic refining

Unit 8: The d and f Block Elements

1. Lanthanoid contraction

Unit 9: Coordination Compounds

1. Denticity of a ligand
2. Coordination isomerism.
3. Linkage isomerism.

Unit 10: Haloalkanes and Haloarenes

1. SN1 and SN2 displacement

Unit 11: Alcohols, Phenols and Ethers

1. Reimer Tiemann reaction
2. Friedel Crafts reaction
3. Friedel Craft’s acetylation of anisole

Unit 12: Aldehydes, Ketones and Carboxylic Acids

1. Cannizzaro reaction
2. Tollen’s reagent
3. Clemmensen reduction
4. Decarboxylation
5. Acetylation
6. Cross aldol condensation
7. Hell-Volhard-Zelinsky reaction.

Unit 13: Amines

1. Hofmann’s bromamide reaction.
2. Gabriel phthalimide synthesis.
3. A coupling reaction
4. Carbylamine reaction

Unit 14: Biomolecules

1. Glycosidic linkage
2. Polypeptide
3. Beta sheet Structure
4. Denaturation
5. Pyranose structure of glucose
6. Biocatalysts

Unit 15: Polymers

1. Polymerisation and its types
2. Elastomer
3. Biodegradable polymers
4. Addition polymers
5. Condensation polymers
6. Copolymers.

Students should remember these definitions to be able to write them correctly during the exam. However, simply “mugging up” these terms and their definitions will not help much. There are 80% chances of forgetting them at the time of exam due to exam anxiety.

Read more: How to Prepare for CBSE Class 12 Exams? 

Hence, you should understand the concept behind these terms or definitions. Reading all the chapters thoroughly from the textbook will help you to develop a better understanding of the concepts. You are advised to study from MTG’s Objective NCERT at Your Fingertips- Chemistry- Class -XI-XII if you really want to be thorough with the Chemistry concepts.

Also, Check out – Board Exam Writing Skills – 5 Tips to Write Perfect Answers

It has been observed that most of the questions in Board exam are asked directly from problems given in the NCERT textbook Exercises or in the NCERT Exemplar book. We have come up with all the solutions to these problems in our book NCERT Solutions-Chemistry and NCERT Exemplar Problems-Solutions  for Class – XI & XII. You are advised to read all the solutions provided in these books that cover complete NCERT and Exemplar, text book questions answers in detail. This will not only help you to understand the concepts but also learn their applications.

Moreover, most of the questions in Board exams are asked from previous papers. MTG’s CBSE Champion-Chemistry provides chapter-wise, topic-wise practice material including previous 10 years’ CBSE Board Examination questions. Preparing for your Chemistry Board paper with the help of this book will give you comprehensive knowledge of the subject according to the latest syllabus and pattern of CBSE Board Examination.

We hope the list of definitions provided in this article will help in your exam preparation and you will be able to score high in the upcoming Board exam.

 “The best preparation for tomorrow is doing your best today”

ALL THE BEST!