Daily Practice

GCSE Science

25th April 1989

5 questions · GCSE · 584 questions in this band

1
Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
2
Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
3
Energy Changes
State whether the combustion of methane is exothermic or endothermic.
4
Exothermic and Endothermic Reactions
Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
5
Bond Energies, Cells and Fuel Cells
State whether breaking a chemical bond requires energy or releases 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.

Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1989, including the monthly compilation PDF.