Daily Practice · GCSE Science

Daily Practice - GCSE Science

29th June 1993

5 questions · GCSE · 584 questions in this band

1
Bond Energies, Cells and Fuel Cells
Hydrogen reacts with chlorine to form hydrogen chloride: H2 + Cl2 -> 2HCl. Use the bond energies given to calculate the overall energy change for this reaction. Bond energies: H-H = 436 kJ/mol, Cl-Cl = 243 kJ/mol, H-Cl = 432 kJ/mol.
2
Rate and Extent of Chemical Change
State what is shown on a rate graph when the line for the volume of gas produced becomes horizontal (flat).
3
Rates of Reaction
Explain how a catalyst increases the rate of a reaction without being used up.
4
Reversible Reactions and Equilibrium
State the catalyst commonly used in the Haber process.
5
Organic Chemistry
State the general formula of the alkanes.

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