Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
27th August 2009
- 1Chemical Changes
State the name given to a reaction in which a substance loses electrons.
- 2Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 3Electrolysis
State the two materials commonly used as inert electrodes in electrolysis, and explain why they must be inert.
- 4Energy Changes
Explain, in terms of bonds, why breaking bonds is an endothermic process.
- 5Exothermic 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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