salt + water — Neutralisation gives a salt and water.

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Just tap any of the four options on this page — no signup, no card, nothing to install. You'll see the correct answer and a full mark-scheme-style explanation within a second. Each visit shows a fresh randomly-picked question from the live OCR GCSE Combined Science (Gateway / Twenty First Century) bank, so you can keep refreshing to try different ones before deciding whether to create a free account for daily access.

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Are the Combined Science (Gateway / Twenty First Century) questions aligned to the OCR GCSE syllabus?

Every question is written against the published OCR GCSE Combined Science (Gateway / Twenty First Century) syllabus and reviewed for accuracy before being added to the bank. We match the command words (state, describe, explain, evaluate), mark allocations, and difficulty tier you'll see on real OCR past papers. Explanations are written in the style of official examiner mark schemes so students learn exactly what marks are being awarded for.

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OCR · GCSE · Combined Science (Gateway / Twenty First Century)

One real Combined Science (Gateway / Twenty First Century) question.
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Topic: C6: Chemical Synthesis. Pick an answer — get the mark scheme instantly.

Question · Difficulty 2/3

Acid + base →

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One real Combined Science (Gateway / Twenty First Century) question.No signup. 30 seconds.

One real Combined Science (Gateway / Twenty First Century) question.
No signup. 30 seconds.