Science, asked by fk0927, 6 months ago

9. लोहे (III) ऑक्साइड और एक धातु X के बीच विस्थापन अभिक्रिया का उपयोग रेल पटरियों को
वेल्डिंग करने के लिए किया जाता है। यहाँ x है:
(a) तांबे के दाने
(b) मैग्नीशियम रिबन
(c) सोडियम छरें
() एल्यूमीनियम की धूल​

Answers

Answered by Λყυѕн
4

Answer:

(d) Dust of Aluminum

Explanation:

In exothermic welding, aluminum dust reduces the oxide of another metal, most commonly iron oxide, because aluminum is highly reactive. Iron(III) oxide is commonly used:

Fe  2 O  3 +2 Al⟶2 Fe+Al  2 O  3

​  

The products are aluminum oxide, free elemental iron, and a large amount of heat. The reactants are commonly powdered and mixed with a binder to keep the material solid and prevent separation.

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