Daily Practice · GCSE Science

Daily Practice - GCSE Science

Biology, chemistry and physics recall, definition and calculation, drawn from every strand.

5th August 2014

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
State the pH value of a neutral solution.
2
Reactivity, Acids and Salts
Define oxidation in terms of electrons.
3
Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.
4
Energy Changes
Using the values in the previous question, calculate the overall energy change for the reaction.
5
Exothermic and Endothermic Reactions
State the energy transfer that occurs during an exothermic reaction.

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