Question: A metal on combustion in excess air forms X, $\mathrm{X}$ upon hydrolysis with water yields $\mathrm{H}_{2} \mathrm{O}_{2}$ and $\mathrm{O}_{2}$ along with another product. The metal is :
$\mathrm{Rb}$
$\mathrm{Na}$
$\mathrm{Mg}$
Li
Correct Option: 1
Solution:
