Hydrogen with varying strengths

How do the strengths of hydrogen bonds vary with the electronegativity of the element to which hydrogen is bonded Where in the above series would you expect hydrogen bonds of the following type to fall ... 

Complex flocculation Flocculation by any of the four mechanisms described above can be accomplished by only one flocculant or retention aid. Much more effective flocculation and retention can be achieved by using combinations of retention aids. The most common combinations are between oppositely charged retention aids, which can form complexes of varying strength with each other. It is, however, also possible to use combinations of nonionic retention aids that can form complexes by hydrogen bonding. 

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