Daily Practice

GCSE Science

3rd May 1991

5 questions · GCSE · 584 questions in this band

1
Reactivity, Acids and Salts
Define oxidation in terms of electrons.
2
Electrolysis
State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
3
Energy Changes
Explain, in terms of bonds, why breaking bonds is an endothermic process.
4
Exothermic and Endothermic Reactions
State the energy transfer that occurs during an exothermic reaction.
5
Bond Energies, Cells and Fuel Cells
State one factor that affects the size of the voltage produced by a chemical cell.

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 May 1991, including the monthly compilation PDF.