ICSE Class 10 Preboard Papers Chemistry: 3 PDFs
ICSE Class 10 preboard papers chemistry resources are available for download below. The table provides three pre-board chemistry papers spanning the 2023, 2025, and 2026 academic sessions. Each paper follows the CISCE-aligned 80-mark, two-hour format, giving Class X students a realistic practice tool for board exam preparation.
Download ICSE Class 10 Chemistry Pre-Board Papers PDF
These are the 3 pre-board papers PDFs hosted on icseboard.org for ICSE Class 10 Chemistry, organised by subject. Each section below explains what those papers cover before the download table.
This group contains three ICSE Class 10 Chemistry pre-board papers from the 2023, 2025, and 2026 academic sessions. Each paper is an 80-mark, two-hour exam divided into a compulsory Section A (40 marks) and a Section B where students attempt any four questions. The papers cover the full syllabus including periodic properties, chemical bonding, electrolysis, metallurgy, and organic chemistry, giving students realistic exam practice.
| Paper | Download |
|---|---|
| Pre Board Chemistry (2026) | Download PDF |
| Pb Chemistry (2025) | Download PDF |
| Pb Chemistry (2023) | Download PDF |
What the Pre-Board Chemistry Papers Cover
The downloaded papers test the full Class 10 Chemistry syllabus. The excerpts show questions spanning periodic properties, chemical bonding, acids, bases and salts, electrolysis, metallurgy, and organic chemistry.
Section A carries 40 marks and is compulsory. It opens with a 15-mark multiple-choice question. Section B requires students to attempt any four questions, also worth 40 marks total. The papers test both factual recall and application of chemical principles.
Exam Pattern and Paper Structure
Every paper in the table follows the same structural format. Students receive 15 minutes of reading time before the two-hour writing period begins. The reading time is not for writing answers.
| Paper Year | Maximum Marks | Time Allowed | Section A | Section B |
|---|---|---|---|---|
| 2023 | 80 | Two hours | 40 marks, compulsory | 40 marks, attempt any four |
| 2025 | 80 | Two hours | 40 marks, compulsory | 40 marks, attempt any four |
| 2026 | 80 | Two hours | 40 marks, compulsory | 40 marks, attempt any four |
The 2025 and 2026 papers explicitly instruct students not to copy questions in the MCQ section. Students must write only the correct answer option. This saves time during the exam.
Recurring Topics Across the Pre-Board Papers
Certain chemistry topics appear repeatedly across the 2023, 2025, and 2026 papers. Identifying these high-frequency areas helps students prioritise revision.
- Coordinate bonding: Asked in the 2023 paper (ammonium chloride example). Students must identify molecules where one atom donates a lone pair.
- Alkene properties and addition reactions: Tested in 2023 and 2026. Questions cover decolourisation of bromine water and unsaturated hydrocarbon behaviour.
- Alloys and their composition: Bronze appears in 2023 (copper and tin) and 2026 (copper, zinc, tin). Brass and solder also feature as distractors.
- Periodic table trends: Ionisation potential and atomic size questions appear in 2026. Neon’s high ionisation potential is explained by its completely filled outermost shell.
- Electrolysis of molten compounds: The 2025 paper asks which compound liberates a reddish-brown gas at the anode. Lead(II) bromide is the answer, releasing bromine vapour.
- Acid strength and ionisation: The 2025 paper distinguishes weak acids from strong acids based on the presence of both molecules and ions in solution.
Worked Example: Vapour Density Calculation
The 2025 paper includes a vapour density question based on butane. This is a straightforward formula application.
Question: If the relative molecular mass of butane (C₄H₁₀) is 58, what is its vapour density?
Solution:
- Write the formula: Vapour Density = Relative Molecular Mass / 2
- Substitute the given value: Vapour Density = 58 / 2
- Calculate the result: Vapour Density = 29
The correct answer is 29. The factor of 2 arises because vapour density compares the mass of a gas to hydrogen (H₂), which has a molecular mass of 2.
How to Use These Papers for Preparation
Downloading the papers is only the first step. Students need a structured approach to extract value from each pre-board.
- Take the 2023 paper first: Use it as a diagnostic test under timed conditions. Spend exactly two hours without referring to the textbook.
- Identify weak topics: After attempting the paper, note which questions were left blank or answered incorrectly. These topics need textbook revision.
- Revise from the textbook: Use the Class 10 Chemistry books to strengthen weak areas. The periodic table and chemical bonding chapters form the foundation for many questions.
- Attempt the 2025 and 2026 papers: These are closer to the current syllabus pattern. Take them closer to the board exam date.
- Review marking patterns: A 15-mark MCQ question requires quick recall. A 5-mark descriptive answer in Section B needs structured steps, balanced equations, and clear reasoning.
Students can also access the broader ICSE Class 10 resource collection for additional subject materials. For official syllabus updates and circulars, the CISCE official website remains the authoritative source.
Common Mistakes Students Make with Pre-Board Papers
- Skipping the reading time strategy: The 15-minute reading period is for planning which Section B questions to attempt. Students who do not plan often run out of time.
- Copying MCQ questions: The 2025 and 2026 papers explicitly state not to copy questions. Writing only the answer option saves valuable time.
- Neglecting Section B choice: Section B requires any four questions. Students who attempt all five waste time on a question that will not be marked.
- Unbalanced chemical equations: Many descriptive answers require equations. An unbalanced equation loses marks even if the explanation is correct.
- Confusing alloy compositions: Bronze (copper and tin) is frequently confused with brass (copper and zinc). Memorise the exact compositions.
Frequently Asked Questions
How many pre-board chemistry papers are available for download?
Three papers are available, covering the 2023, 2025, and 2026 pre-board examinations. Each paper carries 80 marks and follows a two-hour format.
Do these papers include solutions?
No. The downloads contain the question papers only. Students must solve the questions independently or verify answers with their subject teacher.
What is the structure of each pre-board paper?
Each paper has two sections. Section A is worth 40 marks and is compulsory. Section B is worth 40 marks and requires students to attempt any four questions. Section A begins with a 15-mark multiple-choice question.
Are these papers aligned with the current ICSE syllabus?
Yes. The papers are CISCE-aligned and cover the Class 10 Chemistry syllabus including periodic properties, chemical bonding, acids and bases, electrolysis, metallurgy, and organic chemistry.
How should I time myself when taking these papers?
Spend 15 minutes reading the paper first. Then spend two hours writing the answers. Do not write during the reading time, as the instructions explicitly state.
More ICSE study material on this site
Reference: CISCE-aligned ICSE Class 10 textbook material.