St Paul's School — 16+ Chemistry Sample Paper 2025
St Paul's School set this 16+ Chemistry paper in 2025. Hearthprep hosts it as an interactive past paper — 4 questions worth 45 marks in 45 minutes, each marked the moment the paper is submitted and backed by a step-by-step worked solution. Most 16+ entrance exams are sat between November and January of the year of entry.
Real 16+ Chemistry paper from St Paul's School (2025). 4 questions, 45 marks. Answer interactively with worked solutions. Covers Acids, Bases & Salts, Atomic Structure & the Periodic Table, Bonding & Structure, Chemical Reactions & Equations.
This is the school's own past paper, reproduced here with worked solutions by Hearthprep. Most 16+ entrance exams are sat between November and January of the year of entry, so a timed attempt at this paper is worth doing early enough to leave room for the topics it exposes. Work through it on screen with instant marking, or print the PDF and sit it under exam conditions.
- School
- St Paul's School
- Entry level
- 16+
- Subject
- Chemistry
- Year
- 2025
- Questions
- 4
- Marks
- 45
- Time
- 45 minutes
- Exam board
- ISEB
Topics in this paper
- Acids, Bases & Salts
- Atomic Structure & the Periodic Table
- Bonding & Structure
- Chemical Reactions & Equations
Questions in this paper (3 of 4)
- Question 1written answer · 17 marks
This is about structure and bonding. (a) Sodium reacts with iodine to form a substance called sodium iodide. (i) The diagram below shows the outer electrons only in an atom of sodium and an atom of iodine. [Diagram: two dot-and-cross shell circles showing outer electrons only - a small circle labelled Na carrying a single cross on its shell, and a larger circle labelled I carrying seven dots on…
- Question 2written answer · 10 marks
This is about acids. (a) Write a balanced symbol equation, without state symbols, for the reaction between magnesium carbonate and nitric acid. [2] (b)(i) Balance the equation shown below (all the formulae are correct). ....... CuO(s) + ....... H3PO4(aq) -> ....... Cu3(PO4)2(aq) + ....... H2O(aq) [1] (b)(ii) Use your answer to part (b)(i) to write the ionic equation, with state symbols, for the…
- Question 3written answer · 8 marks
This is about redox. (a) The Thermite reaction is used to produce molten iron for welding in the construction industry. 2Al(s) + Fe2O3(s) -> Al2O3(s) + 2Fe(l) (i) From this reaction what can you deduce about the relative reactivity of iron and aluminium? [1] (ii) Use the equation to explain what is meant by the term oxidising agent. [2] (iii) Calculate the mass of iron oxide needed to release 2…
1 further question in this paper open with any paid plan, along with marking and the worked solutions. See plans.
Frequently asked questions
What is in the St Paul's School — 16+ Chemistry Sample Paper 2025?
4 questions worth 45 marks in total, written for 45 minutes. It covers Acids, Bases & Salts, Atomic Structure & the Periodic Table, Bonding & Structure, Chemical Reactions & Equations. St Paul's School set it as a 16+ Chemistry paper.
How long is the St Paul's School 16+ Chemistry paper?
This paper is timed at 45 minutes for 45 marks — roughly 60 seconds a mark. Hearthprep runs the same clock on screen, so your child sees how far through the time they are as they answer.
Can my child answer this paper online?
Yes. Every question on this page can be answered in the browser and is marked the moment the paper is submitted — multiple choice, short answers and written responses alike. Answers are matched leniently, so a correct value written a different way (units, fractions, word numbers) still scores.
Are worked solutions included?
Every question has a step-by-step worked solution and an AI tutor that will talk through it after the paper is submitted. The first 3 questions of this paper are free to try; the remaining 1 and the marking come with a paid plan.
Where does this St Paul's School paper come from?
This is the school's own past paper, reproduced here with worked solutions by Hearthprep. Use it to time a full mock attempt, then drill whichever topics your child drops marks on.
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