Daily Practice · GCSE Science

Daily Practice - GCSE Science

21st February 1996

5 questions · GCSE · 584 questions in this band

1
Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
2
Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
3
Exothermic and Endothermic Reactions
On a reaction profile diagram, the reactants are drawn at a higher energy level than the products. State whether the reaction is exothermic or endothermic.
4
Bond Energies, Cells and Fuel Cells
State the difference between a rechargeable cell and a non-rechargeable cell.
5
Rate and Extent of Chemical Change
State the equation for the mean rate of a reaction in terms of the quantity of reactant used.

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