A colourless liquid, a tertiary amide.
A solid, crystalline compound.
Colourless liquid that gives off smoke in moist air.
An exercise about the polarity of molecules.
Halogen elements are a group in the periodic table consisting of five chemically related elements, fluorine, chlorine, bromine, iodine, and astatine.
The term ´hussar´ refers to a type of light cavalry which originated in Hungary and was the most popular in the 18th–19th centuries.
An exercise about compound ions.
A helical molecule consisting of alpha-D-glucose units. It is one of the basic components of starch.
Bin lorries play an important role in the life of towns and cities.
A circular, domed, portable tent covered by felt, typically used by nomadic peoples.
Not all nets consisting of 6 congruent squares are foldable into cubes.
A polymorphic compound, mostly found in the form of quartz.
A white, crystalline compound that breaks down when affected by light.
Pick the shape that is shown in different views below.
Hypochlorite ions are formed when water is disinfected with chlorine.
Fibroin is a fibrillar protein excreted by silkworms.
Buildings constructed of prefabricated concrete blocks were widespread in the former Socialist countries.
Alpha-D-glucose is one of the stereoisomers of glucoses, specifically the D-glucoses.
Edges, diagonals and faces of a cuboid can be identified by its vertices.
A colourless, viscous liquid, a highly corrosive, strong acid used in several industrial processes.