Scientific Explanations | Material for all Competitive Exams
Why it is dangerous to sleep in an unventilated room with fire burning?
▪ It is dangerous to sleep in an unventilated room with fire burning inside because the fire produces carbon monoxide and carbon dioxide gases. Carbon monoxide is poisonous and can cause death.
Alcohol is sometimes rubbed on the body of a person suffering from fever
▪ As soon as Alcohol is applied on the body, it evaporates taking away some heat from the body. Since evaporation has a cooling effect, the body temperature can be reduced by rubbing alcohol.
Why people used filament of an electric bulb of tungsten?
▪ The filament of an electric bulb is made of tungsten because it has a high melting point and can be heated to a high temperature to emit light.