Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Concentration, Yield and Atom Economy
Why do companies prefer reactions with a high atom economy?
- 2Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
- 3Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 4Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
- 5Energy Changes
Give one everyday example of an endothermic process.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of May 2020, including the monthly compilation PDF.