Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
24th April 2015
- 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
State the name given to a reaction in which a substance loses electrons.
- 4Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 5Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
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