Daily Practice

GCSE Science

28th April 1992

5 questions · GCSE · 584 questions in this band

1
Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
2
Energy Changes
Give one everyday example of an endothermic process.
3
Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
4
Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
5
Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.

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 1992, including the monthly compilation PDF.