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Catalysis

Argon is used...

Question

Argon is used in arc welding because of its

A

low reactivity with metal

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B

ability to lower the melting point of metal

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C

flammability

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D

high calorific value

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Solution

The correct option is A low reactivity with metal
Argon is used to create an inert gas (because of its low reactivity) shield during welding. Argon is frequently blended with carbon dioxide ( $C O_{2}$ ), hydrogen ( $H_{2}$ ), helium (He) or oxygen $(O_{2})$ to enhance the arc characteristics or facilitate metal transfer in Gas Metal Arc Welding

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