861 past contests
Topic 6 · Identifying the hydrolysing species, its equation, and its pka or pkb from the ph of a 0.10 mol/dm3 salt solution
Topic 9 · Volume of gas released from a rocket-fuel reaction using balanced equation stoichiometry
Topic 11 · Molar mass of a gas from its rate of effusion relative to a known gas (graham's law)
Topic 20 · Identifying a metal from a 1:1 reaction with a known volume and concentration of acid
Topic 2 · Standard enthalpy of formation of a hydrocarbon from combustion and formation data (hess's law)
Topic 6 · Equilibrium concentration from kc for the decomposition of hydrogen iodide
Topic 19 · Percentage composition of a carbonate/oxide mixture from mass lost on heating
Topic 6 · Solubility product of a hydroxide from the ph of its saturated solution
Topic 1 · Mass of gas released from a fixed-volume cylinder at constant temperature
Topic 23 · Riddle: isopropanol
Topic 23 · Oxidation pathways and resistance of primary versus secondary alcohols (true/false)
Topic 38 · Electrode products in the electrolysis of brine (true/false)
Topic 5 · Degree of unsaturation of an aromatic hydrocarbon
Topic 20 · Molar solubility of a sparingly soluble salt from a given mass and volume
Topic 11 · Gas volume at stp from combustion/reaction stoichiometry
Topic 5 · Systematic naming of organic compounds from structure
Topic 2 · Naming enthalpies of combustion, vaporization and atomization
Topic 14 · Riddle: hydrochloric acid
Topic 14 · Reactivity of sodium with water compared to potassium, and its redox nature (true/false)
Topic 39 · Emf of a cell from two standard reduction potentials