Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
24th November 2015
- 1Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
- 2Energy Changes
A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
- 3Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
- 4Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.
- 5Rate and Extent of Chemical Change
State the four factors that can increase the rate of a chemical reaction.
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