Daily Practice · GCSE Science

Daily Practice - GCSE Science

Biology, chemistry and physics recall, definition and calculation, drawn from every strand.

7th February 2010

5 questions · GCSE · 584 questions in this band

1
Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
2
Reactivity, Acids and Salts
Explain the difference between a strong acid and a concentrated acid.
3
Electrolysis
Molten zinc chloride, ZnCl2, is electrolysed using inert electrodes. Write the half equation for the reaction at (a) the cathode, and (b) the anode.
4
Energy Changes
Give one everyday example of an endothermic process.
5
Exothermic and Endothermic Reactions
A student heats solid copper carbonate strongly in a test tube, and it breaks down into copper oxide and carbon dioxide. Heating must be continued throughout the reaction for it to keep going. State whether this thermal decomposition reaction is exothermic or endothermic, and explain your reasoning.

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