Daily Practice

GCSE Science

23rd February 1992

5 questions · GCSE · 584 questions in this band

1
Bond Energies, Cells and Fuel Cells
State whether breaking a chemical bond requires energy or releases energy.
2
Rate and Extent of Chemical Change
Explain, using collision theory, why increasing the concentration of a reactant in solution increases the rate of a reaction.
3
Rates of Reaction
A tangent drawn to a volume-time graph at 15 seconds passes through the points (5 s, 6 cm3) and (25 s, 66 cm3). Calculate the rate of reaction at 15 seconds.
4
Reversible Reactions and Equilibrium
The forward reaction of a particular reversible reaction is exothermic. State whether the reverse reaction is exothermic or endothermic.
5
Organic Chemistry
State two products, other than water, that can be formed during the incomplete combustion of a hydrocarbon.

You are looking at an earlier sheet. Today's sheet is the one that adds a day.

Your run is kept in this browser only, and there is no account.

Any date always gives the same five questions, so a sheet can be set again or shared. All of February 1992, including the monthly compilation PDF.