CBSE Class 12 Chemistry sample papers and practice questions
Sample papers work best after you have revised each chapter. Below are a few Chemistry MCQs with answers to check yourself. LerkAI can then create a full practice paper in your board's style for any mix of the 16 chapters, time you, and explain every wrong answer. These are practice papers made by LerkAI, not official CBSE papers, so also solve your board's official sample papers.
How to use this page
- Choose the chapters you have finished revising.
- Generate a timed practice paper with board-style marks.
- Attempt it in one sitting without notes.
- Read the explanation for every wrong answer and practise your weakest chapter again.
Practice questions with answers
The unit of the rate constant for a first order reaction is:
Answer: s⁻¹. For first order, k = rate ÷ [A], giving s⁻¹.
Which is used as a catalyst in the Haber process?
Answer: Iron. Finely divided iron (with molybdenum as promoter) catalyses N₂ + 3H₂ ⇌ 2NH₃.
Aldehydes give a silver mirror with:
Answer: Tollens' reagent. Tollens' reagent is reduced by aldehydes to metallic silver.
Chapters
- The Solid State
- Solutions
- Electrochemistry
- Chemical Kinetics
- Surface Chemistry
- General Principles and Processes of Isolation of Elements
- The p-Block Elements
- The d- and f-Block Elements
- Coordination Compounds
- Haloalkanes and Haloarenes
- Alcohols, Phenols and Ethers
- Aldehydes, Ketones and Carboxylic Acids
- Amines
- Biomolecules
- Polymers
- Chemistry in Everyday Life
Frequently asked questions
Are these official CBSE sample papers?
No. LerkAI creates practice papers in a board-like pattern. Always also solve the official CBSE sample papers.
How many questions can a practice test have?
You can create practice tests with up to 100 questions and an optional timer.
Does LerkAI explain wrong answers?
Yes. After each test you get an explanation for every question you got wrong.