Question

$X$ is a silvery white metal. $X$ reacts with oxygen to form $Y$. The same compound $Y$ is obtained from the metal $X$ on reaction with steam with the liberation of hydrogen gas. Identify $X$ and $Y$.

Answer 1

$X$ is aluminium.
$4Al+3O_2\to 2A{l}_2{O}_3$

$Y$ is aluminium oxide.

$2Al+3H_{2}O\to A{l}_2{O}_3+3H_2$