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Lighthouses are used as an aid to navigation in coastal waters.
It is produced by treating methane with chlorine gas and used as a solvent.
An isomer of butane, a colourless, flammable gas.
Also known as chloroform, used as a solvent in laboratories, earlier as an anaesthetic.
A solid substance formed at low temperatures on the ocean floors of Earth by the high...
A colourless gas with a typical odour, produced by dehydrating methanol.
A solid, grey substance which sublimates when heated. Its solution in alcohol is called...
Log houses were a typical type of dwellings in Hungary in the Árpád era.
The Pauline monastery was built for Hungarian hermit monks in 1225.
A triangular earth fortification, used by the leader of one of the old Hungarian tribes...
The main participants in the battles of the Hungarian War of Independence were the...
This animation demonstrates the types of soil found in Hungary.