Daily Practice

GCSE Science

21st September 1985

5 questions · GCSE · 584 questions in this band

1
Reactivity, Acids and Salts
Complete: acid + metal carbonate gives ...
2
Electrolysis
Explain why solid sodium chloride does not conduct electricity, but molten sodium chloride does.
3
Energy Changes
A reaction profile shows the reactants at 220 kJ and the products at 340 kJ. State whether the reaction is exothermic or endothermic.
4
Exothermic and Endothermic Reactions
State what is meant by the activation energy of a reaction.
5
Bond Energies, Cells and Fuel Cells
State whether forming a new chemical bond requires energy or releases energy.

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