Daily Practice

GCSE Science

22nd March 1993

5 questions · GCSE · 584 questions in this band

1
Electrolysis
Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
2
Energy Changes
Explain, in terms of bonds, why breaking bonds is an endothermic process.
3
Exothermic and Endothermic Reactions
State the energy transfer that occurs during an exothermic reaction.
4
Bond Energies, Cells and Fuel Cells
State one factor that affects the size of the voltage produced by a chemical cell.
5
Rate and Extent of Chemical Change
State two units that the rate of a reaction can be measured in.

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