Daily Practice

GCSE Science

26th April 1985

5 questions · GCSE · 584 questions in this band

1
Concentration, Yield and Atom Economy
Give the formula for percentage yield.
2
Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
3
Reactivity, Acids and Salts
Give the ionic equation for neutralisation.
4
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.
5
Energy Changes
Give one everyday example of an endothermic process.

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