Daily Practice

GCSE Science

9th December 1971

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
State the name given to a reaction in which a substance loses electrons.
2
Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
3
Electrolysis
State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
4
Energy Changes
Explain, in terms of bonds, why breaking bonds is an endothermic process.
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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