Question 1 of 3 · No calculator needed
Which description matches particles in a liquid?
Liquid particles remain close together but have enough energy to move around one another, so a liquid flows while keeping a nearly fixed volume.
Pearson Edexcel International GCSE · Modular · International GCSEChemistry,
Chemistry,
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Specification 4XCH1. Explore a topic, practise the skill, and see where to focus next.
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Question 2 of 3 · No calculator needed
A proposed metal-extraction process uses large amounts of electricity but releases no carbon dioxide at the plant. What is the soundest evaluation?
Electrolysis may avoid direct carbon dioxide at the plant, but cost and lifecycle emissions depend on electricity demand, its source and ore processing.
Question 3 of 3 · No calculator needed
In a simple solution calorimetry experiment, which change most directly reduces heat loss to the room?
An insulated cup and lid reduce energy transfer through the sides and by evaporation, improving the estimate of heat released to the solution.
These tiles show your answers to three questions. They are a starting point, not a mastery score or grade prediction.
Principles of chemistry: Part 1
Correct answer: Close together, randomly arranged and able to move past one another
Liquid particles remain close together but have enough energy to move around one another, so a liquid flows while keeping a nearly fixed volume.
Inorganic chemistry: Part 1
Correct answer: Its overall emissions depend on how the electricity is generated
Electrolysis may avoid direct carbon dioxide at the plant, but cost and lifecycle emissions depend on electricity demand, its source and ore processing.
Physical chemistry: Part 1
Correct answer: Use an insulated cup with a lid
An insulated cup and lid reduce energy transfer through the sides and by evaporation, improving the estimate of heat released to the solution.
For parents: look at the explanation together. A correct answer is encouraging; a missed answer gives you something specific to work on. Broader practice over time is needed to understand progress.
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01Principles of chemistry: Part 1
Specification reference: 1
Partial evaporation makes a concentrated solution; cooling forms crystals, which are then filtered and dried. Strong heating to dryness may decompose some salts.
Watch for: Do not describe Principles of chemistry: Part 1 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
02Inorganic chemistry: Part 1
Specification reference: 2
Excess insoluble oxide uses up the acid; filtration removes unreacted oxide. Partial evaporation and cooling crystallise the salt without decomposing it.
Watch for: Do not describe Inorganic chemistry: Part 1 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
03Physical chemistry: Part 1
Specification reference: 3
Keeping water mass and starting temperature constant makes salt identity the main changed variable and permits a fair comparison of temperature change.
Watch for: Do not describe Physical chemistry: Part 1 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
04Organic chemistry: Part 1
Specification reference: 4
With only single carbon-carbon bonds, each carbon has the maximum number of hydrogen bonds for that chain, so the hydrocarbon is saturated.
Watch for: Do not describe Organic chemistry: Part 1 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
05Principles of chemistry: Part 2
Specification reference: 5
Each graphite carbon bonds to three others, leaving a delocalised electron that can carry charge. All four outer electrons are bonded in diamond.
Watch for: Do not describe Principles of chemistry: Part 2 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
06Inorganic chemistry: Part 2
Specification reference: 6
Chlorine bleaches damp litmus paper. Oxygen relights a glowing splint, hydrogen gives a squeaky pop and carbon dioxide turns limewater milky.
Watch for: Do not describe Inorganic chemistry: Part 2 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
07Physical chemistry: Part 2
Specification reference: 7
A catalyst offers another pathway with a lower activation energy, increasing the fraction of successful collisions while remaining chemically unchanged overall.
Watch for: Do not describe Physical chemistry: Part 2 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
08Organic chemistry: Part 2
Specification reference: 8
Low temperatures make fermentation slow, while high temperatures denature yeast enzymes. Excluding air maintains the anaerobic pathway that produces ethanol.
Watch for: Do not describe Organic chemistry: Part 2 only at the observable level. Use the correct particles, bonding, energy change or quantitative relationship where the question requires it.
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Pearson Edexcel International GCSE · Modular · International GCSE · Chemistry · 4XCH1
Issue 2, September 2024; current checked 28 August 2026
Source checked: 2026-08-28. The current official specification controls assessment requirements and option choices.
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Yes. This page offers three original questions from three different skills on this exact course. Each answer has an explanation, followed by a sample heatmap showing what was correct and what to revisit. No account is needed, and taster answers are not saved.
What does the three-question heatmap tell a parent?
It shows the outcome of these three answers and gives a specific skill to discuss or practise next. It is not a full assessment, a mastery score or a grade prediction. Broader practice over time is needed to understand progress.
What does the Pearson Edexcel International GCSE · Modular International GCSE Chemistry route cover?
LearningP currently maps 8 assessed areas for specification 4XCH1. The visible topic map below is derived from the verified route; the current official specification remains controlling.
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The verified source bank contains 137 original LearningP question records for this route. Every mapped area meets the current publication minimum and passed the latest blocker and review audit.
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