All the compounds listed below will react with water. In which of the cases, same gaseous product is obtained ?

All the following substances react with water. The pair which gives the same gaseous product is:

All the folowing substances react with water. The pair which'gives the same gaseous product is: K' and 'KO_2' 'Na' and 'Na_2 O_2' Ca' and 'CaH_2' Ba' and 'BaO_2'

All the following substances react with water. The pair that gives the same gaseous product is

All the following substances react with water. The pair that gives the same gaseous product is

Which of following couples reacts with water to produce same gaseouse product-

Each of the following compounds react with water but which of these liberate the same gas -