Daily Practice · GCSE Science

Daily Practice - GCSE Science

3rd April 1994

5 questions · GCSE · 584 questions in this band

1
Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
2
Electrolysis
In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.
3
Energy Changes
A reaction profile shows the reactants at 150 kJ and the peak (activation energy point) at 195 kJ. Calculate the activation energy.
4
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.
5
Bond Energies, Cells and Fuel Cells
State the difference between a rechargeable cell and a non-rechargeable cell.

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