Daily Practice · GCSE Science

Daily Practice - GCSE Science

9th November 1996

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.
2
Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
3
Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
4
Energy Changes
State whether the combustion of methane is exothermic or endothermic.
5
Exothermic 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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