JEE Main Chemistry question

Being chemically inert, argon is commonly used to provide a protective inert atmosphere for

(A)Arc welding of reactive metals (e.g. , , stainless steel) and inside incandescent light bulb filaments, to prevent oxidationCorrect
(B)Catalytic cracking of petroleum fractions
(C)Electrolytic refining of copper
(D)The Haber process synthesis of ammonia

Answer: (A)

Solution

Argon's complete chemical inertness and ready, cheap availability (it is the most abundant noble gas in air, by volume) make it the standard choice for shielding gas in arc welding of reactive metals (preventing the

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Question ID VK-146017