Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
29th November 2021
- 1Concentration, Yield and Atom Economy
Why do companies prefer reactions with a high atom economy?
- 2Chemical Changes
Write the word equation for the reaction between zinc and hydrochloric acid.
- 3Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
- 4Electrolysis
In the industrial extraction of aluminium, explain why the carbon anodes need to be replaced regularly.
- 5Energy Changes
State whether the combustion of methane is exothermic or endothermic.
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