Which of the following reaction forms the basis of Goldschmidt alumino-thermite process?

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

Which of the following reaction forms the basis of Goldschmidt alumino-thermite process? (1)

2\text{Al} + \text{N}_2 \rightarrow 2\text{AlN}

(2)

2\text{Al} + 3\text{Cl}_2 \rightarrow 2\text{AlCl}_3

(3)

2\text{Al} + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + 3\text{H}_2

(4)

2\text{Al} + \text{Fe}_2\text{O}_3 \rightarrow \text{Al}_2\text{O}_3 + 2\text{Fe}