Chemistry

This is a complete, free study companion for Chemistry — built around what the exam actually asks. The topics examiners repeat most are Nernst equation and EMF calculation, Rate law, order and concentration effect on reaction rate, and Valence bond theory of [Ni(CN)4]2-. The syllabus runs to 16 chapters. Below you'll find the full topic-frequency ranking, the exam paper pattern, every chapter, a step-by-step study plan, and the official downloads — everything in one place.

Everything here is free. We're an independent student resource, not the official Karnataka Board body, so always confirm the current syllabus and exam dates on the official Karnataka Board website before you rely on them.

Key information

Level: Class 12
Stream: Science
Exam: 2nd Pre-university Course
Conducted by: Karnataka School Examination and Assessment Board (KSEAB)

Most important topics (by past-paper frequency)

#	Topic	Times asked	Likelihood
1	Nernst equation and EMF calculation	4	80%
2	Rate law, order and concentration effect on reaction rate	4	80%
3	Valence bond theory of [Ni(CN)4]2-	4	80%
4	Ostwald process for nitric acid	4	80%
5	Packing efficiency of FCC/CCP unit cell	3	60%
6	Henry's law and gas solubility	3	60%
7	Raoult's law deviations and azeotropes	3	60%
8	Colligative property numerical on molar mass	3	60%
9	Faraday's laws of electrolysis	3	60%
10	First order integrated rate equation	3	60%
11	Half-life of first order reaction	3	60%
12	Physisorption and chemisorption differences	3	60%

Based on how often each topic appeared in official previous-year question papers.

What you will study (chapters)

Chapter 1: The Solid State
Chapter 2: Solutions
Chapter 3: Electrochemistry
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: Organic Compounds Containing Nitrogen
Chapter 14: Biomolecules
Chapter 15: Polymers
Chapter 16: Chemistry in Everyday Life

How to study Chemistry and score well

Start with the highest-frequency topics — In Chemistry, Nernst equation and EMF calculation, Rate law, order and concentration effect on reaction rate, Valence bond theory of [Ni(CN)4]2-, and Ostwald process for nitric acid appear again and again in past papers. Master these first — they return the most marks for the time you put in.
Practise with previous-year papers — Solve the last 5–10 years of Karnataka Board Chemistry papers under timed, exam-like conditions. Past papers show exactly which topics repeat and how questions are worded.
Revise actively, not passively — Write a one-page summary for each of the 16 chapters — key definitions, formulas and the points examiners reward — then re-test yourself instead of re-reading.
Mark your answers with the official scheme — After each practice paper, score yourself against the official marking scheme. It shows how marks are awarded step-by-step, so you learn to present answers the way examiners expect.

Exam tips: how to score higher in Chemistry

Where students lose marks: rushing the high-weightage questions, skipping the steps the marking scheme rewards, and saving easy sections for last. Read the whole paper first, attempt your strongest section early to bank marks, and always show your working.

Manage your time: split your time in proportion to the marks each section carries, keep a few minutes at the end to check, and never leave a question blank — a partial, structured answer still earns partial marks.

Frequently asked questions

What are the most important topics in Chemistry?

Based on past papers, the most frequently asked topics include Nernst equation and EMF calculation, Rate law, order and concentration effect on reaction rate, Valence bond theory of [Ni(CN)4]2-. The full ranked list with how often each appears is in the "Most important topics" section above.

Where can I download Chemistry previous-year question papers?

Official Karnataka Board previous-year question papers are available on the official Karnataka Board website. Open the Question Papers section for the direct link, plus the exam pattern and the topics that repeat most.

How can I prepare for Chemistry faster?

Start with the highest-frequency topics, learn the exam pattern so you know how each section is marked, and practise with past papers. A subject-aware study tutor can quiz you on exactly these topics.

A Gyani AI tutor trained on the Chemistry syllabus and past papers can quiz you on the most-asked topics and show you exactly what to revise.