Do you really know the chemistry of the things you use?
Do you really know the chemistry of the things you use?
Take this test and find out what things are made of
Take this test and find out what things are made of
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Chalk, marble and lime do not differ in their chemical composition. What substance do they consist of?
In an anhydrous state, this salt is colorless and used as an air drier. Its water solution has a blue tint and is widely used as an antiseptic (it is poisonous for most living organisms), and also as a pesticide.
Dry ice is the solid state of this compound
Crystal mainly consists of silicon dioxide SiO₂, but to add hardness to the glass mass the oxides of these two elements are added
In the manufacture of cast iron and steel, molten iron absorbs a small amount of this non-metal
This substance is the main component of anti-freeze
An electric current heats up a tungsten filament which becomes white-hot and emits light in light bulbs. What substance provides the glow of the light-emitting diode?
This polymer is present in velvet and cellophane
Sulfur increases the hardness and elasticity of viscous rubber. What other component increases its durability?
In the engine of the rocket of a first stage instead of dangerous and expensive kerosene it is possible to use this light and cheap weight metal, oxidizing it water.