Daily Practice - GCSE Science
Biology, chemistry and physics recall, definition and calculation, drawn from every strand.
15th September 2016
- 1Rate 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.
- 2Rates of Reaction
Explain why using a light sensor and data logger is more reliable than timing by eye in the disappearing cross practical.
- 3Reversible Reactions and Equilibrium
In the Haber process, N2(g) + 3H2(g) -> 2NH3(g), state the effect of decreasing the pressure on the position of equilibrium.
- 4Organic Chemistry
Define the term 'hydrocarbon'.
- 5Alkanes, Alkenes and Crude Oil
Describe the colour change seen when an alkene is shaken with bromine water.
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