Chemistry-10th Metals and Non-metals CBSE Board 2025 Medium
Aluminium powder is used in thermit welding because :
Aluminium powder is used in thermit welding because :
- (a)Its reaction with iron is highly exothermic.
- (b)When it is heated with iron (III) oxide, molten iron is obtained.
- (c)When it is heated with iron (III) oxide, molten aluminium oxide is obtained to join railway tracks.
- (d)Its melting point is low as compared to iron and a molten alloy of iron and aluminium is formed on heating which is used to join railway tracks.
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