Number of non-radioactive alkali metals forming superoxide as major product on heating with excess O 2 = x , Number of II-A metals of periodic table whose hydroxides are insoluble in aqueous solutio

Question

Number of non-radioactive alkali metals forming superoxide as major product on heating with excess $O_{2} = x$ ,

Number of II-A metals of periodic table whose hydroxides are insoluble in aqueous solution = y Number of non radio active alkali metals which dissolve in liquid ammonia and produce blue colour solution = u

The value of (x + y – u) would be ....

TestHub · Accepted Answer

x = 3 ( K , R b , C s ) y = 2 ( M g , B e ) u = 5 ( C o n ce n t r a t e d so l u t i o n o f a ll a l ka l im e t a l s in l i q u i d amm o niai s b l u eco l o u re d so l u t i o n )

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