Daily Practice

GCSE Science

1st January 1974

5 questions · GCSE · 584 questions in this band

1
Moles, Formulae and Equations
Why is the amount of product directly proportional to the amount of limiting reactant?
2
Concentration, Yield and Atom Economy
Give the formula for percentage yield.
3
Chemical Changes
Calculate the number of moles of sodium hydroxide in 200 cm3 of a 0.500 mol/dm3 solution.
4
Reactivity, Acids and Salts
Give the ionic equation for neutralisation.
5
Electrolysis
In the industrial extraction of aluminium, explain why the aluminium oxide is dissolved in molten cryolite rather than melted on its own.

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