Eduprobe
Question:
A metal on combustion in excess air forms X. X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is: Na Li Mg Rb
Na
Mg
Rb
Li
Solution:
The metal is Rb. Rb + O2(excess) → RbO2
Here product X is RbO2.
2RbO2 + 2H2O → 2RbOH + H2O2 + O2.