Daily Practice

GCSE Science

27th August 1987

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
State the pH value of a neutral solution.
2
Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
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
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.

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