EARTH SCIENCE
GEOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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H-F
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H-Cl
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H-Br
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H-I
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Detailed explanation-1: -And hence HF has highest bond dissociation enthalpy among the four. Q. Boiling point of hydrogen fluoride is highest amongst HF, HCl, HBr and HI.
Detailed explanation-2: -Which bond is stronger HI or HF? The bond dissociation energy of HF (+136 kcal/mol) is much greater than that of HI (+71 kcal/mole). These two factors place the atoms hydrogen and fluorine 71 kcal/mol above the Standard State while the hydrogen atom and iodine atom are 77 kcal/mol above the Standard State.
Detailed explanation-3: -The S−S bond has highest energy and highest bond strength For example, the bond energies of S−S and O−O bond are 49 and 33 kcal/mol respectively.
Detailed explanation-4: -Bond in H2 is strong because bond length is least. Bond in HF is strongest single bond because of high polarity.