Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
23rd December 2023
- 1Quantitative Chemistry
Magnesium is burned in an open crucible and the mass increases. Explain why.
- 2Moles, Formulae and Equations
Why is the amount of product directly proportional to the amount of limiting reactant?
- 3Concentration, Yield and Atom Economy
Give the formula for percentage yield.
- 4Chemical Changes
A student reacts 2.4 g of magnesium with excess dilute hydrochloric acid: Mg + 2HCl -> MgCl2 + H2. Relative atomic mass of Mg = 24. Calculate the number of moles of hydrogen gas produced.
- 5Reactivity, Acids and Salts
Give the ionic equation for neutralisation.
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 December 2023, including the monthly compilation PDF.