Question

The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is:
2 points
Magnesium ribbon
Copper granules
Sodium pellets
Aluminium dust​

Answer 1

a.copper granules

iron react with copper the product is useful for welding rail tracks

copper granules

Answer 2

I think aluminium first is the answer because thermite reaction is used for welding process .

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