Daily Practice · GCSE Science

Daily Practice - GCSE Science

Biology, chemistry and physics recall, definition and calculation, drawn from every strand.

17th March 2020

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
In the gas-volume required practical measuring how concentration affects rate, state one variable that should be controlled.
4
Reversible Reactions and Equilibrium
State what is meant by dynamic equilibrium.
5
Organic Chemistry
State what happens to the boiling point of hydrocarbons as their chain length increases.

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.

Every sheet is deterministic: the same date always regenerates the same five questions. All of March 2020, including the monthly compilation PDF.