Explain thermit reaction.How is it used to join railway tracks?

Asked by  | 3rd Sep, 2008, 08:03: PM

Expert Answer:

The thermite reaction involves a mixture of iron oxide and aluminum that has been placed in a flower pot and covered with potassium permanganate. Some glycerin is poured over the potassium permanganate and eventually begins to react. When the iron oxide-aluminum mixture is ignited, a very vigorous reaction occurs and a molten metal is dropped  from the flower pot into a gap between the railway track.

Answered by  | 4th Sep, 2008, 11:13: PM

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