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Question

The increasing order of the strength of the hydrogen bond in the following mentioned linkages is:
(i)OHS(ii)SHO(iii)FHF(iv)FHO

A
(i) < (ii) < (iv) < (iii)
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B
(ii) < (i) < (iv) < (iii)
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C
(i) < (ii) < (iii) < (iv)
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D
(ii) < (i) < (iii) < (iv)
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Solution

The correct option is B (ii) < (i) < (iv) < (iii)
The strength of Hbond depends on the following factors:
  • (i) Electronegativity of element covalently bonded to a hydrogen atom.
  • (ii) Size of the electronegative element.
  • (iii) Ease of donation of lone pair of electrons by electronegative element.
Electronegativity order :F>O>S
Hence, the order is (ii)<(i)<(iv)<(iii).

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