861 past contests
Topic 6 · Graham's law: diffusion rate versus density/molar mass (true/false)
Topic 6 · Partial pressure is proportional to mole fraction, not molar mass (dalton's law) (true/false)
Topic 20 · Diluting a sodium sulfate stock to a target na+ concentration
Topic 20 · Diluting a magnesium chloride stock to a target cl- concentration
Topic 20 · Diluting a diprotic-acid stock to a target h+ concentration
Topic 6 · Boyle's law explained via the kinetic theory of gases
Topic 6 · Charles' law explained via the kinetic theory of gases
Topic 6 · Gas laws combining into the ideal gas equation
Topic 16 · Brick-red precipitate with fehling's reagent indicates a reducing sugar
Topic 16 · Blue-black colour with iodine indicates starch
Topic 22 · Ammonia gas release on heating an organic compound with naoh indicates an amide
Topic 31 · Element symbols derived from latin names: sn, pb, na
Topic 16 · Riddle: crystallization from saturated solution
Topic 7 · Kmno4 oxidizes secondary alcohols to ketones (true/false)
Topic 7 · Hot acidified kmno4 oxidizes toluene's methyl group to benzoic acid (true/false)
Topic 32 · True or false: diamond and silicon are metalloids or non-metals
Topic 14 · Lindane's identity and synthesis route from benzene chlorination (true/false)
Topic 7 · Toluene oxidation to benzoic acid does not require alkaline kmno4 (true/false)
Topic 12 · Concentration of excess acid remaining after a partial acid-base neutralization
Topic 20 · Moles of salt formed from mixing an acid and base of given concentrations/volumes