Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
27th October 2014
- 1Bond Energies, Cells and Fuel Cells
State the only substance produced when a hydrogen fuel cell reacts pure hydrogen with pure oxygen.
- 2Rate 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.
- 3Rates of Reaction
In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.
- 4Reversible Reactions and Equilibrium
State what is meant by dynamic equilibrium.
- 5Organic Chemistry
State what happens to the boiling point of hydrocarbons as their chain length increases.
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