Daily Practice · GCSE Science

Daily Practice - GCSE Science

19th April 1994

5 questions · GCSE · 584 questions in this band

1
Concentration, Yield and Atom Economy
Calculate the concentration in moles per cubic decimetre of a solution containing 0.5 mol in 250 cubic centimetres.
2
Chemical Changes
State the name given to a reaction in which a substance loses electrons.
3
Reactivity, Acids and Salts
Name the salt made from zinc oxide and nitric acid.
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
Explain, in terms of bonds, why breaking bonds is an endothermic process.

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