Science B, Combined (9-1) - Twenty First Century Science Suite J260 9-1: C6: Making useful chemicals Topical Past Paper Questions
OCR GCSE (9-1) Science B, Combined (9-1) - Twenty First Century Science Suite J260 (9-1) past-paper questions on C6: Making useful chemicals, free. This topic is frequently examined across 6 exam sessions. Sign in for the full topic-segregated question bank and AI worksheets.
Sample questions
Lifeboats sometimes use tow ropes during rescues. (a)* A lifeboat organisation wants to buy a new tow rope. The tow rope must: - have a breaking force greater than 88MN • stretch easily to store energy as the boats go over waves • sink in sea water. The table shows some propertie…
Alex plans to make a pure, dry sample of copper sulfate crystals. (a) Alex adds solid copper oxide to aqueous sulfuric acid in a beaker until no more solid reacts. This is the symbol equation for the reaction: (i) Why should there be some solid copper oxide left in the beaker? [1…
Sarah investigates the rate of reaction when zinc reacts with dilute sulfuric acid. She adds small pieces of zinc to 50 cm $ ^{3} $ of 0.1 mol/dm $ ^{3} $ sulfuric acid. She measures the volume of hydrogen gas collected every 30 seconds. Sarah finds that the reaction is very slow…
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