Question 7
Which of these is a use of sodium?
The right answer is the one marked above.
Electric lamps that give out yellow light. The yellow street lamp is sodium at work.
Sodium is also used to produce sodium cyanide for extracting gold and silver, to make sodium amalgam as a reducing agent, to separate metals such as titanium and zirconium from their compounds, and to produce dyes such as indigo for denim. Pencils are graphite; tyres are filled with nitrogen.