Question : In arc welding, argon is used because of its
Option 1: low reactivity with metal
Option 2: ability to lower the melting point of the metal
Option 3: high flammability
Option 4: high calorific value
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Correct Answer: low reactivity with metal
Solution : The correct option is low reactivity with metal .
Arc welding is a type of welding in which an electric arc is formed between an electrode and the workpiece, melting the metal at the joint and forming a weld. Argon's low reactivity and inert nature make it an excellent shielding gas in Arc welding.
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