KVS has released Chemistry pre-board question papers from across all its regions for 2024-25 and 2025-26. Here's a full breakdown of the paper format, the highest-weightage topics, and direct download links — all in one place.
Chemistry is the subject where students tend to lose the most marks not from lack of knowledge — but from losing track of steps in numerical problems, forgetting name reactions under pressure, or mixing up similar-sounding organic mechanisms. Pre-board papers are the best cure for all three. They force you to retrieve information under time pressure, which is exactly what the board exam demands.
This year, KVS has uploaded pre-board question papers from all its regions in a single Google Drive folder. We went through over 22 files from that folder — here's the full picture.
📥 Download All Chemistry Pre-Board Papers
Official Google Drive folder maintained by KVS — contains PDFs from regions including Jaipur, Lucknow, Chennai, Hyderabad, Bengaluru, Kolkata, and Bhubaneswar. Papers from both 2024-25 and 2025-26 sessions included.
📂 Click to open Access the Folder →The folder has over 22 PDFs from KVS regions across the country — Jaipur, Lucknow, Chennai, Hyderabad, Bengaluru, Kolkata, and Bhubaneswar. Every paper follows the standard CBSE Chemistry (043) format: 70 marks, 3 hours, divided into five sections. The variety of regions means you get genuinely different numerical values and question framings for the same core concepts — ideal for thorough preparation.
| Section | Question Type | No. of Questions | Total Marks |
|---|---|---|---|
| Section A | MCQ | 16 | 16 |
| Section B | Short Answer (2 marks) | 5 | 10 |
| Section C | Short Answer (3 marks) | 7 | 21 |
| Section D | Case-Based (4 marks) | 2 | 8 |
| Section E | Long Answer (5 marks) | 3 | 15 |
| Total | — | 33 | 70 Marks |
Time allotted is 3 hours. Internal choices are available in Sections C, D, and E. The case-based questions in Section D are particularly important — they present a short paragraph scenario and ask you to apply concepts directly, which many students find unexpectedly tricky.
After reviewing papers from seven different regions, these are the topics that appear most consistently. If revision time is short, these are your priority:
1. Solutions and Colligative Properties — Every single regional paper has at least one calculation-based question here. Common question types include: calculating molar mass from osmotic pressure, finding the van't Hoff factor for electrolytes like CCl₃COOH, calculating vapour pressure of a 1 molal solution, and depression of freezing point problems. These are straightforward if you know the formulas cold — but the Hyderabad paper pairs them with the Nernst equation in the same section, so don't treat them in isolation.
2. Chemical Kinetics Numericals — First-order reaction problems dominate. You need to be fast and accurate with the integrated rate law formula. The most common question type: given t₁/₂, calculate the time for 90% decomposition — and then some papers go further and ask for 99% completion as a follow-up. The Hyderabad paper had this exact multi-step question. Practice it until the calculation is automatic.
3. Coordination Compounds — IUPAC naming, identifying the type of isomerism, and finding the number of isomers for a given complex are all tested. The Bhubaneswar paper asked for the total number of isomers of [Co(en)₂Cl₂]⁺ — know how to approach these systematically. VBT hybridization questions (inner vs outer orbital complexes, magnetic character) are Section C favourites across all regions.
The folder includes papers from: Jaipur, Lucknow, Chennai, Hyderabad, Bengaluru, Kolkata, and Bhubaneswar. That's seven different regions — more variety than any other subject folder in this KVS collection. Each region brings slightly different numerical values and organic conversion questions, making it possible to practice the same concept type multiple times without repetition.
Worth highlighting: the Chennai paper has a strong set of organic chemistry questions including nitration of chlorobenzene and a well-framed question on structural vs linkage isomerism. If organic chemistry is a weak area, start with the Chennai paper.
Attempt the full paper under timed conditions — 3 hours, no pausing. Chemistry more than any other subject punishes poor time management. Students who haven't timed themselves often find they run out of time on Section E long answers after spending too long on Section C calculations.
After the attempt, evaluate each numerical carefully — even if you got the right answer, check that your steps and units are correct. CBSE chemistry marking is step-wise, meaning a wrong final answer can still earn partial marks if the method is right. Getting into that habit now will protect your score in the actual board exam.
For name reactions and organic mechanisms, maintain a dedicated revision list. Every time a pre-board paper has a name reaction you weren't sure about, add it to the list. By the time you've done 4–5 regional papers, that list will cover almost everything the board exam can throw at you.
Share this with your study group and bookmark it for quick access to the download link. More subject-wise breakdowns — Physics, Mathematics, and others — are available on this site.
Best of luck with your boards. You've got this.
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