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The p-Block Elements
Question
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Arrange the following in the order of the property indicated by each set:

 
(i) HF, HCl, HBr, HI - increasing bond dissociation enthalpy.


(ii) H2O, H2S, H2Se, H2Te- increasing acidic character. 

Answer

i) The arrangement of the given hydrogen halides in increasing order of bond-dissociation enthalpy is given below:


H-I < H-Br < H-Cl < H-F


(ii) The increasing order of acidic character of the given hydrides of Group 16 elements is given below:

H2O, <H2S,< H2Se,< H2Te

 

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