Tamil Nadu Board Class 12 Chemistry — Important Questions 2026
Most important questions for Tamil Nadu Board Class 12 Chemistry board exam 2026. Chapter-wise questions with marking scheme and expected topics.
Quick Summary
This page covers the most important questions for Tamil Nadu Board Class 12 Chemistry board exam 2026, based on previous year question papers and expected topics. Focus on these for maximum marks.
How to Use Important Questions
- Start with high-weightage chapters — focus on chapters that carry the most marks in the exam.
- Practice writing answers — don't just read; write out answers within the time limit to build speed.
- Cross-reference with syllabus — ensure every chapter is covered by checking the syllabus page.
- Revise with notes — after practising, use revision notes for quick recap before the exam.
Chapter-Wise Important Questions — 15 Chapters
Focus on high-weightage chapters first. Each chapter below lists the types of questions frequently asked in Tamil Nadu Board board exams.
Metallurgy
45 questionsIn the Ellingham diagram, the line for CO formation has a negative slope (slopes downward). What does this indicate?
According to the Ellingham diagram, which of the following metals CANNOT have its oxide reduced by carbon (coke) at any practically achievable temperature?
In the Hall-Heroult process for extraction of aluminium, what is the role of cryolite (Na₃AlF₆) in the electrolytic cell?
In the electrolytic refining of a metal, what happens at the anode during the process?
+41 more questions — practice in Super Tutor
Ionic Equilibrium
45 questionsAt a certain temperature, Kw = 9 × 10⁻¹⁴. What is the pH of a neutral solution at this temperature?
The solubility of Ag₂CrO₄ in water is 1.5 × 10⁻⁴ mol/L. What is the Ksp of Ag₂CrO₄?
What is the pH of 0.1 M NH₄Cl solution? Given: Kb for NH₄OH = 1.8 × 10⁻⁵, Kw = 10⁻¹⁴.
Which statement correctly explains why the conjugate base of a strong acid is a weak base?
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p-Block Elements-I
44 questionsWhat is the chemical formula of Borax?
When borax is dissolved in hot water, its solution is:
Boric acid is a weak acid because it:
What type of bonds are the bridging B-H-B bonds in diborane (B₂H₆)?
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Where can I find Tamil Nadu Board Class 12 Chemistry Important Questions?
This page provides important questions for Tamil Nadu Board Class 12 Chemistry for the 2026 board exam. For chapter-by-chapter study help including summaries, quizzes, and flashcards, try Super Tutor.
Is Tamil Nadu Board Class 12 Chemistry easy to score in?
Chemistry is one of the scoring subjects in Tamil Nadu Board Class 12 if prepared well. Focus on understanding concepts, practising problems regularly, and revising key formulas. Most students who follow a structured study plan score above 80%.
How to prepare for Tamil Nadu Board Class 12 Chemistry board exam?
Start by understanding the complete syllabus. Then focus on important questions from each chapter. Use revision notes for quick review before exams. Follow a study plan that covers all chapters with dedicated revision time.
How many questions come from each chapter in Tamil Nadu Board Class 12 Chemistry?
The question paper distribution varies each year, but certain chapters consistently carry more marks. Check the marks distribution section above for chapter-wise weightage based on previous year patterns.
Browse Important Questions by Chapter
15 chapters available
Metallurgy
Ionic Equilibrium
p-Block Elements-I
Electro Chemistry
p-Block Elements - II
Surface Chemistry
Transition and Inner Transition Elements
Hydroxy Compounds and Ethers
Coordination Chemistry
Carbonyl Compounds and Carboxylic Acids
Solid State
Organic Nitrogen Compounds
Chemical Kinetics
Biomolecules
Chemistry in Everyday Life
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Tamil Nadu Board Class 12
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