Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
8th October 2018
- 1Concentration, Yield and Atom Economy
Why do companies prefer reactions with a high atom economy?
- 2Chemical Changes
Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 3Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 4Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 5Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
You are looking at an earlier sheet. Today's sheet is the one that adds a day.
Your run is kept in this browser only, and there is no account.
Recent GCSE Science sheets
Every sheet is deterministic: the same date always regenerates the same five questions. All of October 2018, including the monthly compilation PDF.