Daily Practice

GCSE Science

16th June 1970

5 questions · GCSE · 584 questions in this band

1
Reactivity, Acids and Salts
Why is aluminium extracted by electrolysis rather than by reduction with carbon?
2
Electrolysis
Concentrated sodium chloride solution (brine) is electrolysed using inert electrodes. State the products formed at the cathode and at the anode.
3
Energy Changes
State whether the combustion of methane is exothermic or endothermic.
4
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.
5
Bond Energies, Cells and Fuel Cells
State whether breaking a chemical bond requires energy or releases energy.

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