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Question

Which property is not due to H-bonding?
  1. High boiling point of water
  2. High viscosity of glycerol
  3. Solubility of ammonia in water
  4. Polar nature of halogen acid


Solution

The correct option is D Polar nature of halogen acid
(a) High boiling point of H2O is due to intermolecular H - bonding.

(b ) Glycerol has 3 OH groups and these three are involved in H-bonding. This means that the intermolecular forces are much greater because of these hydrogen bonds. Therefore, the viscosity is high.

(c) The solubility of a substance in water depends on its polar nature. NH3 molecules, being polar, readily bond with H2O molecules by H-bonding, making it water soluble.

(d) Polar nature of halogen acids (HX) is due to the electronegativity difference between H and halogen atoms. Except Fluorine, other halogens do not show H-bonding due to their large sizes and diffused electrons, reducing the charge density that is required for H-bonding.

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