Daily Practice · GCSE Science

Daily Practice - GCSE Science

18th December 1995

5 questions · GCSE · 584 questions in this band

1
Bond Energies, Cells and Fuel Cells
State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
2
Rate and Extent of Chemical Change
A reaction between calcium carbonate and hydrochloric acid produces 72 cm3 of carbon dioxide gas in 30 seconds. Calculate the mean rate of reaction.
3
Rates of Reaction
Explain why increasing temperature increases the rate of a reaction, referring to both the frequency and the energy of collisions.
4
Reversible Reactions and Equilibrium
State the effect of increasing the temperature on the position of equilibrium of a reaction whose forward reaction is exothermic.
5
Organic Chemistry
Name the process used to separate crude oil into fractions.

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