Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
15th April 2006
- 1Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.
- 2Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
- 3Electrolysis
State the name given to the negative electrode in electrolysis.
- 4Energy Changes
State whether the combustion of methane is exothermic or endothermic.
- 5Exothermic and Endothermic Reactions
Explain, in terms of the reaction pathway, why adding a catalyst increases the rate of a reaction without changing the overall energy change of the reaction.
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