The number of s-block elements which dissolve in liquid ammonia and produce blue or blue black colour solution = x
(Be, Mg, Ca, Na, K, Rb, Ba)
Number of the following compounds which contain peroxide ion/linkage = y
(RbO₂ , CsO₂ , BaO₂ , PbO₂ , H₂O₂ , SrO₂ )
Then find the value of (x + y)

Question

The number of s-block elements which dissolve in liquid ammonia and produce blue or blue black colour solution = x

(Be, Mg, Ca, Na, K, Rb, Ba)

Number of the following compounds which contain peroxide ion/linkage = y

(RbO₂ , CsO₂ , BaO₂ , PbO₂ , H₂O₂ , SrO₂ )

Then find the value of (x + y)

TestHub · Accepted Answer

To find x: All alkali metals (Na, K, Rb) and heavier alkaline earth metals (Ca, Ba) dissolve in liquid ammonia to form blue solutions. Mg and Be do not. So, x = 5.

To find y: Peroxides are BaO₂, H₂O₂, SrO₂. Superoxides are RbO₂, CsO₂. PbO₂ is lead(IV) oxide. So, y = 3.

Therefore, x + y = 5 + 3 = 8.

Chemistry - Complete s-block Question with Solution | TestHub

Doubts & Discussion