Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
25th March 2018
- 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
Explain why aluminium cannot be extracted from aluminium oxide by heating with carbon.
- 4Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
- 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 March 2018, including the monthly compilation PDF.