Predict which of the following hydroxy compounds is acidic and which is basic in aqueous solution :
(i). `CsOH` , ii. `IOH`.
`EN` values are: `Cs = 0.7, O = 3.5, H = 2.1, I = 2.5`.

Explanation

The `EN` values of different elements present in `CsOH` and `IOH` and those of `chi_(O) - chi_(H), chi_(O) - chi_(Cs)` and `chi_(O) - chi_(I)` are given below:
`{{:(Deltachi rArr Cs,overset(2.8)to,Ooverset(1.4)to,H),(ENrArr,0.7,3.5,2.1):}:|{:(I,overset(0.1)to,Ooverset(1.4)to,H),(2.5,,3.5,2.1):}`
Here `chi_(O) = chi_(Cs) (2.8) gt chi_(O) - chi_(I) (1.0)`, so `CsOH` will give `overset(ɵ)(OH)` ions while `IOH` will give `H_(3)O^(o+)` ions, consequently `CsOH` behaves as a base while `IOH` behaves as an acid.