Compound X and aluminium are used to join railway tracks. (a) Identify the compound X (b) Name the reaction (c) Write down its reaction.

Explanation

(a) Compound X is iron (Ill) oxide, `Fe_(2)O_(3)`.
(b) The reaction is known as thermite reaction
(C) The reaction that takes place is as follows
`underset("Iron (III)oxide (X)")(Fe_(2)O_(3)(s))+underset("Aluminium powder (reducing agent)")(2Al(s))overset(D)tounderset("Iron metal (molten state)")(2Fe(l))+underset("Aluminium oxide")(Al_(2)O_(3)(s))+"Heat"`