During arc welding, metals are joined at extremely high temperatures. A stream of gas, called a shielding gas, is directed around the weld area to protect the hot metal.
Explain why argon, rather than air, is used as a shielding gas during arc welding.
Group 0 Questions
Practise Edexcel GCSE Chemistry Group 0 with exam-style questions for Foundation and Higher tier. 30 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.