Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
- 1Moles, Formulae and Equations
Calculate the mass of 0.25 mol of sodium hydroxide, NaOH. (Na = 23, O = 16, H = 1)
- 2Concentration, Yield and Atom Economy
Give the formula for atom economy.
- 3Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
- 4Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
- 5Electrolysis
State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
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 May 2010, including the monthly compilation PDF.