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.

Solution

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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