Daily Practice

GCSE Science

18th November 1983

5 questions · GCSE · 584 questions in this band

1
Moles, Formulae and Equations
Define the limiting reactant.
2
Concentration, Yield and Atom Economy
Why do companies prefer reactions with a high atom economy?
3
Chemical Changes
State the pH value of a neutral solution.
4
Reactivity, Acids and Salts
State what is observed when magnesium ribbon is added to copper sulfate solution.
5
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.

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