Question 15
Periodic TableThe noble gas, argon, is used for
- A.electric arc welding
- B.welding brass
- C.underwater welding
- D.steel welding
Show the answer and explanation
Answer: A (electric arc welding)
Explanation
Argon is unreactive, so it is blown around the electric arc during welding to keep air away from the hot metal and stop it being oxidised.