Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
15th June 2007
- 1Moles, Formulae and Equations
Define the limiting reactant.
- 2Concentration, Yield and Atom Economy
Why do companies prefer reactions with a high atom economy?
- 3Chemical Changes
Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 4Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 5Electrolysis
Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of June 2007, including the monthly compilation PDF.