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Question

Which of the following chemicals substance has the strongest hydrogen bond?


A

HCl

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B

H2O

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C

HI

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D

H2S

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Solution

The correct option is B

H2O


Explanation for correct option:

(B)H2O

Hydrogen bonding in water:

  • In water molecules, the electrostatic attraction that takes place between the partial positive chargeδ+ of Hydrogen atoms and the partial negative charge δ- on Oxygen atoms is known as Hydrogen bonding.
  • The hydrogen bonding that is present in water molecules is intermolecular hydrogen bonding.
  • Hydrogen bonding in water is shown below:

Explanation for incorrect options:

The strongest hydrogen bond is formed by a Hydrogen atom when bonded to an atom having a small size and a larger electronegativity.

Oxygen (O) is smaller in size and the highest in electronegativity than elements such as Cl,IandS. Thus, options A, C, and D.

Hence, the correct option is B i.e. H2O.


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